diff --git a/AUTHORS.md b/AUTHORS.md
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -356,6 +356,7 @@
 - jeongminkim-islab
 - kaizshang91
 - lux-lth
+- luz paz
 - lwolfsonkin
 - mbrackeantidot
 - mjfs
diff --git a/MANUAL.txt b/MANUAL.txt
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -1,7 +1,7 @@
 ---
 title: Pandoc User's Guide
 author: John MacFarlane
-date: August 18, 2022
+date: August 22, 2022
 ---
 
 # Synopsis
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,36 @@
 # Revision history for pandoc
 
+## pandoc 2.19.2 (2022-08-22)
+
+  * Fix regression with data uris in 2.19.1 (#8239).
+    In 2.19.1 we used the base64URL encoding rather than base64.
+
+  * pandoc-server: handle `citeproc` parameter as documented (#8235).
+
+  * Org reader: treat *emacs-jupyter* src blocks as code cells (#8236,
+    Albert Krewinkel). This improves support for notebook-like org files
+    that are intended to be used with emacs-jupyter package.
+
+  * HTML writer and templates: revert to using `width` property for column
+    widths (Albert Krewinkel). The default `flex` and `overflow-x` properties
+    of a column are set to `auto`. In combination, these changes allow to
+    get good results when using columns with or without explicit widths.
+
+  * Org writer (Albert Krewinkel):
+
+    + Add support for jupyter nodebook cells (#6367).
+    + Prefix code language of ipynb code blocks with `jupyter-`.
+      This is the convention used by the *emacs-jupyter* package.
+    + Keep code block attributes as header args. This allows to keep more
+      information in the resulting `src` blocks, making it easier to
+      roundtrip from or through Org. Org babel ignores unknown header
+      arguments.
+    + Add code block identifier as `#+name` to src blocks.
+
+  * Fix some typos in the codebase (luz paz).
+
+  * Require hslua-module-path 1.0.3 (#8228, Albert Krewinkel).
+
 ## pandoc 2.19.1 (2022-08-18)
 
   * Add server capabilities.
diff --git a/data/templates/default.rst b/data/templates/default.rst
--- a/data/templates/default.rst
+++ b/data/templates/default.rst
@@ -12,7 +12,7 @@
 :Date: $^$$date$
 $endif$
 $if(address)$
-:Addresss: $^$$address$
+:Address: $^$$address$
 $endif$
 $if(contact)$
 :Contact: $^$$contact$
diff --git a/data/templates/styles.html b/data/templates/styles.html
--- a/data/templates/styles.html
+++ b/data/templates/styles.html
@@ -164,7 +164,7 @@
 code{white-space: pre-wrap;}
 span.smallcaps{font-variant: small-caps;}
 div.columns{display: flex; gap: min(4vw, 1.5em);}
-div.column{flex: 1;}
+div.column{flex: auto; overflow-x: auto;}
 div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
 ul.task-list{list-style: none;}
 ul.task-list li input[type="checkbox"] {
diff --git a/man/pandoc.1 b/man/pandoc.1
--- a/man/pandoc.1
+++ b/man/pandoc.1
@@ -14,7 +14,7 @@
 . ftr VB CB
 . ftr VBI CBI
 .\}
-.TH "Pandoc User\[cq]s Guide" "" "August 18, 2022" "pandoc 2.19.1" ""
+.TH "Pandoc User\[cq]s Guide" "" "August 22, 2022" "pandoc 2.19.2" ""
 .hy
 .SH NAME
 pandoc - general markup converter
diff --git a/pandoc.cabal b/pandoc.cabal
--- a/pandoc.cabal
+++ b/pandoc.cabal
@@ -1,6 +1,6 @@
 cabal-version:   2.4
 name:            pandoc
-version:         2.19.1
+version:         2.19.2
 build-type:      Simple
 license:         GPL-2.0-or-later
 license-file:    COPYING.md
@@ -495,7 +495,7 @@
                  gridtables            >= 0.0.3    && < 0.1,
                  haddock-library       >= 1.10     && < 1.12,
                  hslua-module-doclayout>= 1.0.4    && < 1.1,
-                 hslua-module-path     >= 1.0      && < 1.1,
+                 hslua-module-path     >= 1.0.3    && < 1.1,
                  hslua-module-system   >= 1.0      && < 1.1,
                  hslua-module-text     >= 1.0      && < 1.1,
                  hslua-module-version  >= 1.0      && < 1.1,
diff --git a/src/Text/Pandoc/Class/IO.hs b/src/Text/Pandoc/Class/IO.hs
--- a/src/Text/Pandoc/Class/IO.hs
+++ b/src/Text/Pandoc/Class/IO.hs
@@ -36,7 +36,7 @@
 
 import Control.Monad.Except (throwError)
 import Control.Monad.IO.Class (MonadIO, liftIO)
-import Data.ByteString.Base64.URL (decodeBase64Lenient)
+import Data.ByteString.Base64 (decodeBase64Lenient)
 import Data.ByteString.Lazy (toChunks)
 import Data.Text (Text, pack, unpack)
 import Data.Time (TimeZone, UTCTime)
diff --git a/src/Text/Pandoc/Readers/FB2.hs b/src/Text/Pandoc/Readers/FB2.hs
--- a/src/Text/Pandoc/Readers/FB2.hs
+++ b/src/Text/Pandoc/Readers/FB2.hs
@@ -25,7 +25,7 @@
 module Text.Pandoc.Readers.FB2 ( readFB2 ) where
 import Control.Monad.Except (throwError)
 import Control.Monad.State.Strict
-import Data.ByteString.Lazy.Base64.URL
+import Data.ByteString.Lazy.Base64
 import Data.Functor
 import Data.List (intersperse)
 import qualified Data.Map as M
diff --git a/src/Text/Pandoc/Readers/HTML.hs b/src/Text/Pandoc/Readers/HTML.hs
--- a/src/Text/Pandoc/Readers/HTML.hs
+++ b/src/Text/Pandoc/Readers/HTML.hs
@@ -27,7 +27,7 @@
 import Control.Monad (guard, msum, mzero, unless, void)
 import Control.Monad.Except (throwError, catchError)
 import Control.Monad.Reader (ask, asks, lift, local, runReaderT)
-import Data.Text.Encoding.Base64.URL (encodeBase64)
+import Data.Text.Encoding.Base64 (encodeBase64)
 import Data.Char (isAlphaNum, isLetter)
 import Data.Default (Default (..), def)
 import Data.Foldable (for_)
diff --git a/src/Text/Pandoc/Readers/Org/Blocks.hs b/src/Text/Pandoc/Readers/Org/Blocks.hs
--- a/src/Text/Pandoc/Readers/Org/Blocks.hs
+++ b/src/Text/Pandoc/Readers/Org/Blocks.hs
@@ -311,7 +311,11 @@
   content        <- rawBlockContent blockType
   resultsContent <- option mempty babelResultsBlock
   let identifier = fromMaybe mempty $ blockAttrName blockAttrs
-  let codeBlk    = B.codeBlockWith (identifier, classes, kv) content
+  let classes'   = case classes of
+                     c:cs | Just c' <- T.stripPrefix "jupyter-" c ->
+                            c' : "code" : cs
+                     _ -> classes
+  let codeBlk    = B.codeBlockWith (identifier, classes', kv) content
   let wrap       = maybe pure addCaption (blockAttrCaption blockAttrs)
   return $
     (if exportsCode kv    then wrap codeBlk   else mempty) <>
diff --git a/src/Text/Pandoc/SelfContained.hs b/src/Text/Pandoc/SelfContained.hs
--- a/src/Text/Pandoc/SelfContained.hs
+++ b/src/Text/Pandoc/SelfContained.hs
@@ -19,7 +19,7 @@
 import Control.Applicative ((<|>))
 import Control.Monad.Trans (lift)
 import Data.ByteString (ByteString)
-import Data.ByteString.Base64.URL (encodeBase64)
+import Data.ByteString.Base64 (encodeBase64)
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy as L
 import qualified Data.Text as T
diff --git a/src/Text/Pandoc/Server.hs b/src/Text/Pandoc/Server.hs
--- a/src/Text/Pandoc/Server.hs
+++ b/src/Text/Pandoc/Server.hs
@@ -38,7 +38,6 @@
 import Text.Pandoc.Shared (safeStrRead, headerShift, filterIpynbOutput,
                            eastAsianLineBreakFilter, stripEmptyParagraphs)
 import Text.Pandoc.App.Opt ( IpynbOutput (..), Opt(..), defaultOpts )
-import Text.Pandoc.Filter (Filter(..))
 import Text.Pandoc.Builder (setMeta)
 import Text.Pandoc.SelfContained (makeSelfContained)
 import System.Exit
@@ -122,6 +121,7 @@
   { options               :: Opt
   , text                  :: Text
   , files                 :: Maybe (M.Map FilePath Blob)
+  , citeproc              :: Maybe Bool
   } deriving (Show)
 
 instance Default Params where
@@ -129,6 +129,7 @@
     { options = defaultOpts
     , text = mempty
     , files = Nothing
+    , citeproc = Nothing
     }
 
 -- Automatically derive code to convert to/from JSON.
@@ -138,6 +139,7 @@
      <$> parseJSON (Object o)
      <*> o .: "text"
      <*> o .:? "files"
+     <*> o .:? "citeproc"
 
 
 -- This is the API.  The "/convert" endpoint takes a request body
@@ -327,15 +329,11 @@
 
     let addMetadata m' (Pandoc m bs) = Pandoc (m <> m') bs
 
-    let hasCiteprocFilter [] = False
-        hasCiteprocFilter (CiteprocFilter:_) = True
-        hasCiteprocFilter (_:xs) = hasCiteprocFilter xs
-
     reader (text params) >>=
       return . transforms . addMetadata meta >>=
-      (if hasCiteprocFilter (optFilters opts)
-          then processCitations
-          else return) >>=
+        (case citeproc params of
+          Just True -> processCitations
+          _ -> return) >>=
       writer
 
   htmlFormat :: Maybe Text -> Bool
diff --git a/src/Text/Pandoc/Writers/EPUB.hs b/src/Text/Pandoc/Writers/EPUB.hs
--- a/src/Text/Pandoc/Writers/EPUB.hs
+++ b/src/Text/Pandoc/Writers/EPUB.hs
@@ -449,7 +449,7 @@
                       writeHtmlStringForEPUB version o
   metadata <- getEPUBMetadata opts meta
 
-  -- retreive title of document
+  -- retrieve title of document
   let plainTitle :: Text
       plainTitle = case docTitle' meta of
                         [] -> case epubTitle metadata of
diff --git a/src/Text/Pandoc/Writers/FB2.hs b/src/Text/Pandoc/Writers/FB2.hs
--- a/src/Text/Pandoc/Writers/FB2.hs
+++ b/src/Text/Pandoc/Writers/FB2.hs
@@ -21,7 +21,7 @@
 import Control.Monad (zipWithM)
 import Control.Monad.Except (catchError, throwError)
 import Control.Monad.State.Strict (StateT, evalStateT, get, gets, lift, liftM, modify)
-import Data.ByteString.Base64.URL (encodeBase64)
+import Data.ByteString.Base64 (encodeBase64)
 import Data.Char (isAscii, isControl, isSpace)
 import Data.Either (lefts, rights)
 import Data.List (intercalate)
diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs
--- a/src/Text/Pandoc/Writers/HTML.hs
+++ b/src/Text/Pandoc/Writers/HTML.hs
@@ -876,7 +876,7 @@
   let isCslBibEntry = "csl-entry" `elem` classes
   let kvs = [(k,v) | (k,v) <- kvs'
                    , k /= "width" || "column" `notElem` classes] ++
-            [("style", "flex:" <> w <> ";")  | "column" `elem` classes
+            [("style", "width:" <> w <> ";") | "column" `elem` classes
                                              , ("width", w) <- kvs'] ++
             [("role", "doc-bibliography") | isCslBibBody && html5] ++
             [("role", "doc-biblioentry") | isCslBibEntry && html5]
diff --git a/src/Text/Pandoc/Writers/Org.hs b/src/Text/Pandoc/Writers/Org.hs
--- a/src/Text/Pandoc/Writers/Org.hs
+++ b/src/Text/Pandoc/Writers/Org.hs
@@ -105,6 +105,14 @@
            => Block         -- ^ Block element
            -> Org m (Doc Text)
 blockToOrg Null = return empty
+blockToOrg (Div (_, ["cell", "code"], _) (CodeBlock attr t : bs)) = do
+  -- ipynb code cell
+  let (ident, classes, kvs) = attr
+  blockListToOrg (CodeBlock (ident, classes ++ ["code"], kvs) t : bs)
+blockToOrg (Div (_, ["output", "execute_result"], _) [CodeBlock _attr t]) = do
+  -- ipynb code result
+  return $ "#+RESULTS:" $$
+    (prefixed ": " . vcat . map literal $ T.split (== '\n') t)
 blockToOrg (Div attr@(ident,_,_) bs) = do
   opts <- gets stOptions
   -- Strip off bibliography if citations enabled
@@ -148,7 +156,10 @@
                   then empty
                   else cr <> propertiesDrawer attr
   return $ headerStr <> " " <> contents <> drawerStr <> cr
-blockToOrg (CodeBlock (_,classes,kvs) str) = do
+blockToOrg (CodeBlock (ident,classes,kvs) str) = do
+  let name = if T.null ident
+             then empty
+             else literal $ "#+name: " <> ident
   let startnum = maybe "" (\x -> " " <> trimr x) $ lookup "startFrom" kvs
   let numberlines = if "numberLines" `elem` classes
                       then if "continuedSourceBlock" `elem` classes
@@ -156,10 +167,18 @@
                              else " -n" <> startnum
                       else ""
   let at = map pandocLangToOrg classes `intersect` orgLangIdentifiers
-  let (beg, end) = case at of
-                      []    -> ("#+begin_example" <> numberlines, "#+end_example")
-                      (x:_) -> ("#+begin_src " <> x <> numberlines, "#+end_src")
-  return $ literal beg $$ literal str $$ text end $$ blankline
+  let lang = case at of
+        []  -> Nothing
+        l:_ -> if "code" `elem` classes    -- check for ipynb code cell
+               then Just ("jupyter-" <> l)
+               else Just l
+  let args = mconcat $
+             [ " :" <> k <> " " <> v
+             | (k, v) <- kvs, k `notElem` ["startFrom", "org-language"]]
+  let (beg, end) = case lang of
+        Nothing -> ("#+begin_example" <> numberlines, "#+end_example")
+        Just x  -> ("#+begin_src " <> x <> numberlines <> args, "#+end_src")
+  return $ name $$ literal beg $$ literal str $$ literal end $$ blankline
 blockToOrg (BlockQuote blocks) = do
   contents <- blockListToOrg blocks
   return $ blankline $$ "#+begin_quote" $$
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -20,7 +20,7 @@
 - hslua-core-2.2.1
 - hslua-marshalling-2.2.1
 - hslua-module-doclayout-1.0.4
-- hslua-module-path-1.0.2
+- hslua-module-path-1.0.3
 - hslua-module-system-1.0.2
 - hslua-module-text-1.0.2
 - hslua-module-version-1.0.2
diff --git a/test/Tests/Readers/Creole.hs b/test/Tests/Readers/Creole.hs
--- a/test/Tests/Readers/Creole.hs
+++ b/test/Tests/Readers/Creole.hs
@@ -119,7 +119,7 @@
                          , plain "blubb" ]
         , "nested many unordered lists, one separating space" =:
           ("* foo\n** bar\n*** third\n*** third two\n** baz\n*** third again\n"
-           <> "**** fourth\n***** fith\n* blubb")
+           <> "**** fourth\n***** fifth\n* blubb")
           =?> bulletList [ plain "foo"
                            <> bulletList [ plain "bar"
                                            <> bulletList [ plain "third"
@@ -129,7 +129,7 @@
                                                          <> bulletList [
                                                              plain "fourth"
                                                              <> bulletList [
-                                                                 plain "fith"
+                                                                 plain "fifth"
                                                                  ]
                                                              ]
                                                          ]
@@ -166,7 +166,7 @@
                          , plain "blubb" ]
         , "nested many ordered lists, one separating space" =:
           ("# foo\n## bar\n### third\n### third two\n## baz\n### third again\n"
-           <> "#### fourth\n##### fith\n# blubb")
+           <> "#### fourth\n##### fifth\n# blubb")
           =?> orderedList [ plain "foo"
                            <> orderedList [ plain "bar"
                                            <> orderedList [ plain "third"
@@ -176,7 +176,7 @@
                                                          <> orderedList [
                                                              plain "fourth"
                                                              <> orderedList [
-                                                                 plain "fith"
+                                                                 plain "fifth"
                                                                  ]
                                                              ]
                                                          ]
@@ -189,7 +189,7 @@
                          , plain "blubb" ]
         , "mixed nested ordered and unordered lists, one separating space" =:
           ("# foo\n** bar\n### third\n### third two\n** baz\n### third again\n"
-           <> "#### fourth\n***** fith\n# blubb")
+           <> "#### fourth\n***** fifth\n# blubb")
           =?> orderedList [ plain "foo"
                            <> bulletList [ plain "bar"
                                            <> orderedList [ plain "third"
@@ -199,7 +199,7 @@
                                                          <> orderedList [
                                                              plain "fourth"
                                                              <> bulletList [
-                                                                 plain "fith"
+                                                                 plain "fifth"
                                                                  ]
                                                              ]
                                                          ]
diff --git a/test/Tests/Readers/Org/Inline.hs b/test/Tests/Readers/Org/Inline.hs
--- a/test/Tests/Readers/Org/Inline.hs
+++ b/test/Tests/Readers/Org/Inline.hs
@@ -186,7 +186,7 @@
                   , "3" <> subscript "{}"
                   , "4" <> superscript ("(a(" <> strong "b(c" <> ")d))")
                   ])
-  , "Verbatim text can contain equal signes (=)" =:
+  , "Verbatim text can contain equal signs (=)" =:
       "=is_subst = True=" =?>
       para (codeWith ("", ["verbatim"], []) "is_subst = True")
 
diff --git a/test/Tests/Writers/Org.hs b/test/Tests/Writers/Org.hs
--- a/test/Tests/Writers/Org.hs
+++ b/test/Tests/Writers/Org.hs
@@ -66,4 +66,24 @@
           , "- ☒ b"
           ]
     ]
+
+  , testGroup "code blocks"
+    [ "identifier"
+      =: codeBlockWith ("abc", ["python"], []) "return True"
+      =?> T.unlines
+      [ "#+name: abc"
+      , "#+begin_src python"
+      , "return True"
+      , "#+end_src"
+      ]
+
+    , "attributes"
+      =: codeBlockWith ("", ["python"], [("cache", "yes"), ("noweb", "yes")])
+                       "'Hello'"
+      =?> T.unlines
+      [ "#+begin_src python :cache yes :noweb yes"
+      , "'Hello'"
+      , "#+end_src"
+      ]
+    ]
   ]
diff --git a/test/command/1710.md b/test/command/1710.md
--- a/test/command/1710.md
+++ b/test/command/1710.md
@@ -19,17 +19,17 @@
 <section id="slide-one" class="slide level1">
 <h1>Slide one</h1>
 <div class="columns">
-<div class="column" style="flex:40%;">
+<div class="column" style="width:40%;">
 <ul>
 <li>a</li>
 <li>b</li>
 </ul>
-</div><div class="column" style="flex:40%;">
+</div><div class="column" style="width:40%;">
 <ul>
 <li>c</li>
 <li>d</li>
 </ul>
-</div><div class="column" style="flex:10%;">
+</div><div class="column" style="width:10%;">
 <p>ok</p>
 </div>
 </div>
diff --git a/test/command/6367.md b/test/command/6367.md
new file mode 100644
--- /dev/null
+++ b/test/command/6367.md
@@ -0,0 +1,75 @@
+```
+% pandoc -f ipynb -t org
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "A Markdown cell"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "2"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# A code cell\n",
+    "1 + 1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Another Markdown cell"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.2"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
+^D
+A Markdown cell
+
+#+begin_src jupyter-python
+# A code cell
+1 + 1
+#+end_src
+
+#+RESULTS:
+: 2
+
+Another Markdown cell
+```
diff --git a/test/command/8236.md b/test/command/8236.md
new file mode 100644
--- /dev/null
+++ b/test/command/8236.md
@@ -0,0 +1,15 @@
+```
+% pandoc -f org -t native
+  #+begin_src jupyter-python :session py :display plain
+  import pandas as pd
+  df = pd.read_csv('weight.csv', parse_dates=['Date'], index_col=0)
+  #+end_src
+^D
+[ CodeBlock
+    ( ""
+    , [ "python" , "code" ]
+    , [ ( "session" , "py" ) , ( "display" , "plain" ) ]
+    )
+    "import pandas as pd\ndf = pd.read_csv('weight.csv', parse_dates=['Date'], index_col=0)\n"
+]
+```
diff --git a/test/command/zeitschrift-fur-kunstgeschichte.csl b/test/command/zeitschrift-fur-kunstgeschichte.csl
--- a/test/command/zeitschrift-fur-kunstgeschichte.csl
+++ b/test/command/zeitschrift-fur-kunstgeschichte.csl
@@ -20,7 +20,7 @@
     <category field="humanities"/>
     <category field="history"/>
     <issn>0044-2992</issn>
-    <summary>From the editors: "Die Herausgeber werden im Falle von Editionen, Lexika und Ausstellungskatalogen dem Titel nachgestellt [use encyclopedia articles with or without container-title for that]. Bei gewöhnlichen Sammelbänden werden die Herausgeber dem Titel vorangestellt [use book for that]." Multilingual style; the information for exhibition catalogues should be entered in the field collection-title; locators may use the word "here" or "hier" in front of the page refering to which must be entered individually (the style outputs the locator as it is entered w/o any label or additional text).</summary>
+    <summary>From the editors: "Die Herausgeber werden im Falle von Editionen, Lexika und Ausstellungskatalogen dem Titel nachgestellt [use encyclopedia articles with or without container-title for that]. Bei gewöhnlichen Sammelbänden werden die Herausgeber dem Titel vorangestellt [use book for that]." Multilingual style; the information for exhibition catalogues should be entered in the field collection-title; locators may use the word "here" or "hier" in front of the page referring to which must be entered individually (the style outputs the locator as it is entered w/o any label or additional text).</summary>
     <updated>2016-02-03T17:41:02+00:00</updated>
     <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>
   </info>
diff --git a/test/lhs-test.html b/test/lhs-test.html
--- a/test/lhs-test.html
+++ b/test/lhs-test.html
@@ -149,7 +149,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/lhs-test.html+lhs b/test/lhs-test.html+lhs
--- a/test/lhs-test.html+lhs
+++ b/test/lhs-test.html+lhs
@@ -149,7 +149,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/s5-basic.html b/test/s5-basic.html
--- a/test/s5-basic.html
+++ b/test/s5-basic.html
@@ -14,7 +14,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/s5-fancy.html b/test/s5-fancy.html
--- a/test/s5-fancy.html
+++ b/test/s5-fancy.html
@@ -14,7 +14,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/s5-inserts.html b/test/s5-inserts.html
--- a/test/s5-inserts.html
+++ b/test/s5-inserts.html
@@ -12,7 +12,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/writer.html4 b/test/writer.html4
--- a/test/writer.html4
+++ b/test/writer.html4
@@ -152,7 +152,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/test/writer.html5 b/test/writer.html5
--- a/test/writer.html5
+++ b/test/writer.html5
@@ -152,7 +152,7 @@
     code{white-space: pre-wrap;}
     span.smallcaps{font-variant: small-caps;}
     div.columns{display: flex; gap: min(4vw, 1.5em);}
-    div.column{flex: 1;}
+    div.column{flex: auto; overflow-x: auto;}
     div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
     ul.task-list{list-style: none;}
     ul.task-list li input[type="checkbox"] {
diff --git a/trypandoc/index.html b/trypandoc/index.html
--- a/trypandoc/index.html
+++ b/trypandoc/index.html
@@ -175,7 +175,7 @@
  <p class="version">pandoc version <span id="version"></span></p>
 </footer>
 
-<script src="trypandoc.js?202208182155"></script>
+<script src="trypandoc.js?202208191048"></script>
 
 </body>
 </html>
diff --git a/trypandoc/trypandoc.js b/trypandoc/trypandoc.js
--- a/trypandoc/trypandoc.js
+++ b/trypandoc/trypandoc.js
@@ -52,15 +52,16 @@
 }
 
 function handleErrors(response) {
-    if (response.status == 503 || response.status == 500) {
+    if (response.status == 503) {
         throw Error("Conversion timed out.")
-    } else if (!response.ok) {
-        throw Error(response.statusText);
+//    } else if (!response.ok) {
+//        throw Error(response.statusText);
     }
     return response;
 }
 
 function convert() {
+    document.getElementById("results").textContent = "";
     let text = document.getElementById("text").value;
     let from = document.getElementById("from").value;
     let to = document.getElementById("to").value;
@@ -78,7 +79,11 @@
        fetch("/cgi-bin/pandoc-server.cgi", {
          method: "POST",
          headers: {"Content-Type": "application/json"},
-         body: JSON.stringify(params)
+         body: JSON.stringify({ from: params.from,
+                                to: params.to,
+                                text: params.text,
+                                standalone: params.standalone,
+                                citeproc: params.citeproc })
         })
        .then(handleErrors)
        .then(response => response.text())
@@ -95,7 +100,7 @@
           document.getElementById("permalink").href = permalink();
        })
        .catch(error => {
-         document.getElementById("results").textContent = error;
+         document.getElementById("results").textContent = error
        }
        );
     };
