diff --git a/Hledger/Cli/Commands/Web.hs b/Hledger/Cli/Commands/Web.hs
--- a/Hledger/Cli/Commands/Web.hs
+++ b/Hledger/Cli/Commands/Web.hs
@@ -142,7 +142,7 @@
       getReportParameters = do
           app <- getYesod
           t <- liftIO $ getCurrentLocalTime
-          a <- fromMaybe "" <$> lookupGetParam "x"
+          a <- fromMaybe "" <$> lookupGetParam "a"
           p <- fromMaybe "" <$> lookupGetParam "p"
           let opts = appOpts app ++ [Period p]
               args = appArgs app ++ [a]
@@ -277,7 +277,7 @@
                       (True, ((acct, _, _, _):_)) ->
                           let a' = if isAccountRegex a then a else acct
                               a'' = accountNameToAccountRegex $ parentAccountName $ accountRegexToAccountName a'
-                              parenturl = (here, [("y",a''), ("p",p)])
+                              parenturl = (here, [("a",a''), ("p",p)])
                           in [$hamlet|
                               \ | $
                               %a!href=@?parenturl@ show more &uarr;
@@ -836,7 +836,7 @@
 
 navlink :: TemplateData -> String -> HledgerWebAppRoute -> Hamlet HledgerWebAppRoute
 navlink TD{here=here,a=a,p=p} s dest = [$hamlet|%a#$s$link.$style$!href=@?u@ $s$|]
- where u = (dest, concat [(if null a then [] else [("z", a)])
+ where u = (dest, concat [(if null a then [] else [("a", a)])
                          ,(if null p then [] else [("p", p)])])
        style | dest == here = "navlinkcurrent"
              | otherwise    = "navlink"
@@ -880,7 +880,7 @@
   stopfiltering = if filtering then [$hamlet|%a#stopfilterlink!href=@?u@ stop filtering acct/desc|] else nulltemplate
       where u = (here, if filteringperiod then [("p", p)] else [])
   stopfilteringperiod = if filteringperiod then [$hamlet|%a#stopfilterlink!href=@?u@ stop filtering period|] else nulltemplate
-      where u = (here, if filtering then [("q", a)] else [])
+      where u = (here, if filtering then [("a", a)] else [])
 
 helplink :: String -> String -> Hamlet HledgerWebAppRoute
 helplink topic label = [$hamlet|%a!href=$u$!target=hledgerhelp $label$|]
diff --git a/Hledger/Cli/Version.hs b/Hledger/Cli/Version.hs
--- a/Hledger/Cli/Version.hs
+++ b/Hledger/Cli/Version.hs
@@ -10,7 +10,7 @@
 import Hledger.Data.Utils
 
 -- version and PATCHLEVEL are set by the makefile
-version       = "0.12.0"
+version       = "0.12.1"
 
 #ifdef PATCHLEVEL
 patchlevel = "." ++ show PATCHLEVEL -- must be numeric !
diff --git a/MANUAL.markdown b/MANUAL.markdown
--- a/MANUAL.markdown
+++ b/MANUAL.markdown
@@ -4,7 +4,7 @@
 
 # hledger manual
 
-This is the official hledger manual, for version 0.12.0.  You may also
+This is the official hledger manual, for version 0.12.1.  You may also
 want to visit the rest of [hledger.org](http://hledger.org), and for
 background,
 [c++ ledger's manual](http://joyful.com/repos/ledger/doc/ledger.html).
@@ -72,9 +72,7 @@
 working first, then try these one at a time:
 
 - `-fweb` builds the [web](#web) command, enabling a web-based user
-  interface. This requires GHC 6.12. If you are stuck with GHC 6.10,
-  you can use `-fweb610` instead, to build an older version of the web
-  interface.
+  interface. This requires GHC 6.12 or greater.
 
 - `-fvty` builds the [vty](#vty) command, enabling a basic
   curses-style user interface. This does not work on microsoft
@@ -122,7 +120,7 @@
     $ hledger histogram                     # transactions per day, or other interval
     $ hledger add                           # add some new transactions to the journal file
     $ hledger vty                           # curses ui, if installed with -fvty
-    $ hledger web                           # web ui, if installed with -fweb or -fweb610
+    $ hledger web                           # web ui, if installed with -fweb
     $ hledger chart                         # make a balance chart, if installed with -fchart
 
 You'll find more examples below.
@@ -217,7 +215,7 @@
       register  - show transactions as a register with running balance
       stats     - show various statistics for a journal
       vty       - run a simple curses-style UI (if installed with -fvty)
-      web       - run a simple web-based UI (if installed with -fweb or -fweb610)
+      web       - run a simple web-based UI (if installed with -fweb
       chart     - generate balances pie charts (if installed with -fchart)
       test      - run self-tests
 
@@ -1002,24 +1000,10 @@
 - **Do you have a new enough version of GHC ?** hledger supports GHC 6.10
   and 6.12. Building with the `-fweb` flag requires 6.12 or greater.
 
-- **Do you have a new enough version of cabal-install ?**
-  Recent versions tend to be better at resolving dependencies.  The error
-  `setup: failed to parse output of 'ghc-pkg dump'` is another symptom of
-  this.  To update, do:
-  
-        $ cabal update
-        $ cabal install cabal-install
-        $ cabal clean
-        
-    then try installing hledger again.
-
-- **Could not run trhsx.**
-  You are installing with `-fweb610`, which needs to run the `trhsx` executable.
-  It is installed by the hsx package in `~/.cabal/bin`, which needs to be in
-  your path. Do something like:
-
-        $ echo 'export PATH=$PATH:~/.cabal/bin' >> ~/.bash_profile; source ~/.bash_profile
-
+- **An error while building non-hledger packages.**
+  Resolve these problem packages one at a time. Eg, cabal install pkg1.
+  Look for the cause of the failure near the end of the output. If it's
+  not apparent, try again with `-v2` or `-v3` for more verbose output.
 
 - **Could not run happy.**
   A package (eg haskell-src-exts) needs to run the `happy` executable.
@@ -1051,6 +1035,21 @@
 - **A ghc: panic! (the 'impossible' happened)** might be
     [this issue](http://hackage.haskell.org/trac/ghc/ticket/3862)
 
+- **This package indirectly depends on multiple versions of the same package.**
+  You may have previously installed some of hledger's dependencies
+  depending on different versions of (eg) parsec. Then cabal install hledger gives
+  an error like this:
+
+        Warning: This package indirectly depends on multiple versions of the same
+        package. This is highly likely to cause a compile failure.
+        package yesod-0.5.0.3 requires parsec-2.1.0.1
+        package csv-0.1.1 requires parsec-3.1.0
+        ...
+
+    The above example could be resolved by, eg:
+
+        $ cabal install yesod --reinstall --constraint 'parsec == 3.1.0"
+
 - **Another error while building a hledger package.**
     The current hledger release might have a coding error, or dependency
     error. You could try installing the
@@ -1067,25 +1066,16 @@
         $ cd ..
         $ cabal install [-f...]
 
-- **An error while building non-hledger packages.**
-  Resolve these problem packages one at a time. Eg, cabal install pkg1.
-  Look for the cause of the failure near the end of the output. If it's
-  not apparent, try again with `-v2` or `-v3` for more verbose output.
-
-- **This package indirectly depends on multiple versions of the same package.**
-  You may have previously installed some of hledger's dependencies
-  depending on different versions of (eg) parsec. Then cabal install hledger gives
-  an error like this:
-
-        Warning: This package indirectly depends on multiple versions of the same
-        package. This is highly likely to cause a compile failure.
-        package yesod-0.5.0.3 requires parsec-2.1.0.1
-        package csv-0.1.1 requires parsec-3.1.0
-        ...
-
-    The above example could be resolved by, eg:
-
-        $ cabal install yesod --reinstall --constraint 'parsec == 3.1.0"
+- **Do you have a new enough version of cabal-install ?**
+  Recent versions tend to be better at resolving dependencies.  The error
+  `setup: failed to parse output of 'ghc-pkg dump'` is another symptom of
+  this.  To update, do:
+  
+        $ cabal update
+        $ cabal install cabal-install
+        $ cabal clean
+        
+    then try installing hledger again.
 
 - **cabal fails to resolve dependencies.**
   It's possible for cabal to get confused, eg if you have
diff --git a/NEWS.markdown b/NEWS.markdown
--- a/NEWS.markdown
+++ b/NEWS.markdown
@@ -4,21 +4,31 @@
 
 # hledger news
 
+## 2010/9/6 hledger 0.12.1
+
+  * web: fix account filtering breakage
+  * installing: tighten up utf8-string dependency
+
 ## 2010/9/5 hledger 0.12
 
+  * web: new, better web ui; accounts are now a permanent sidebar; add form uses auto-completing combo fields
   * installing: fix a build error with parsec 3 (#22)
   * installing: require exactly matching hledger-lib version for more robust builds
   * installing: explicit data-object dependency to ensure hledger and hledger-lib use the same time version
+  * installing: explicit hamlet dependency for more robust building
   * installing: build threaded and with warnings
   * installing: drop -fweb610 flag
   * installing: add gtk2hs-buildtools dependency needed to build with -fchart
+  * installing: require cabal 1.6 or greater
   * add -D/--daily flag
   * register: with --depth, clip account names or aggregate postings rather than excluding them
-  * web: new, better web ui; accounts are now a permanent sidebar; add form uses auto-completing combo fields
   * fix !include with deeply nested directories (#21)
   * fix obscured date parse errors with parsec 3
   * handle unicode better in errors
   * fix a ghc 6.12.3 error when running interpreted
+
+Stats: 50 days and 90 commits since last release, now at 5741
+lines of code with 136 tests and 41% unit test coverage.
 
 ## 2010/07/17 hledger 0.11.1
 
diff --git a/hledger.cabal b/hledger.cabal
--- a/hledger.cabal
+++ b/hledger.cabal
@@ -1,5 +1,5 @@
 name:           hledger
-version: 0.12
+version: 0.12.1
 category:       Finance
 synopsis:       A command-line (or curses or web-based) double-entry accounting tool.
 description:
@@ -73,7 +73,7 @@
                   Hledger.Cli.Commands.Register
                   Hledger.Cli.Commands.Stats
   build-depends:
-                  hledger-lib == 0.12
+                  hledger-lib == 0.12.1
                  ,HUnit
                  ,base >= 3 && < 5
                  ,containers
@@ -89,7 +89,7 @@
                  ,safe >= 0.2
                  ,split == 0.1.*
                  ,time
-                 ,utf8-string >= 0.3
+                 ,utf8-string >= 0.3.5 && < 0.4
 
   if flag(chart)
     cpp-options: -DCHART
@@ -137,7 +137,7 @@
                   Hledger.Cli.Commands.Register
                   Hledger.Cli.Commands.Stats
   build-depends:
-                  hledger-lib == 0.12
+                  hledger-lib == 0.12.1
                  ,HUnit
                  ,base >= 3 && < 5
                  ,containers
@@ -153,7 +153,7 @@
                  ,safe >= 0.2
                  ,split == 0.1.*
                  ,time
-                 ,utf8-string >= 0.3
+                 ,utf8-string >= 0.3.5 && < 0.4
 
 source-repository head
   type:     darcs