diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,15 @@
-## Version 0.43 (May, 2023)
+## Version 0.44 (July, 2022)
+
+_Breaking changes_
+
+  - Building with UTF-8 support is now mandatory (the with_utf8 flag
+    is gone).
+
+_Bug fixes_
+
+  - Fix for -W "0" monitor spec in logarithmic bars.
+
+## Version 0.43 (May, 2022)
 
 _New features_
 
diff --git a/doc/plugins.org b/doc/plugins.org
--- a/doc/plugins.org
+++ b/doc/plugins.org
@@ -1117,7 +1117,7 @@
 
       - Aliases to the interface name: so =Network "eth0" []= can be used as
         =%eth0%=
-      - Thresholds refer to velocities expressed in Kb/s
+      - Thresholds refer to velocities expressed in B/s
       - Args: default monitor arguments, plus:
 
         - =--rx-icon-pattern=: dynamic string for reception rate in =rxipat=.
@@ -1129,15 +1129,15 @@
       - Variables that can be used with the =-t=/=--template= argument: =dev=,
         =rx=, =tx=, =rxbar=, =rxvbar=, =rxipat=, =txbar=, =txvbar=, =txipat=,
         =up=. Reception and transmission rates (=rx= and =tx=) are displayed
-        by default as Kb/s, without any suffixes, but you can set the =-S= to
-        "True" to make them displayed with adaptive units (Kb/s, Mb/s, etc.).
+        by default as KB/s, without any suffixes, but you can set the =-S= to
+        "True" to make them displayed with adaptive units (KB/s, MB/s, etc.).
       - Default template: =<dev>: <rx>KB|<tx>KB=
 
 ***** =DynNetwork Args RefreshRate=
 
       - Active interface is detected automatically
       - Aliases to "dynnetwork"
-      - Thresholds are expressed in Kb/s
+      - Thresholds are expressed in B/s
       - Args: default monitor arguments, plus:
 
       - =--rx-icon-pattern=: dynamic string for reception rate in =rxipat=.
@@ -1150,7 +1150,7 @@
 
       Reception and transmission rates (=rx= and =tx=) are displayed in Kbytes
       per second, and you can set the =-S= to "True" to make them displayed
-      with units (the string "Kb/s").
+      with units (the string "KB/s").
       - Default template: =<dev>: <rx>KB|<tx>KB=
       - Example of usage of =--devices= option:
 
diff --git a/src/Xmobar/Config/Parse.hs b/src/Xmobar/Config/Parse.hs
--- a/src/Xmobar/Config/Parse.hs
+++ b/src/Xmobar/Config/Parse.hs
@@ -26,12 +26,12 @@
 
 import Xmobar.Config.Types
 
-#if defined XFT || defined UTF8
+#ifdef XFT
 import qualified System.IO as S (readFile)
 #endif
 
 readFileSafe :: FilePath -> IO String
-#if defined XFT || defined UTF8
+#ifdef XFT
 readFileSafe = S.readFile
 #else
 readFileSafe = readFile
diff --git a/src/Xmobar/Plugins/EWMH.hs b/src/Xmobar/Plugins/EWMH.hs
--- a/src/Xmobar/Plugins/EWMH.hs
+++ b/src/Xmobar/Plugins/EWMH.hs
@@ -23,11 +23,7 @@
 import Graphics.X11 hiding (Modifier, Color)
 import Graphics.X11.Xlib.Extras
 import Xmobar.Run.Exec
-#ifdef UTF8
-#undef UTF8
 import Codec.Binary.UTF8.String as UTF8
-#define UTF8
-#endif
 import Foreign.C (CChar, CLong)
 import Xmobar.X11.Events (nextEvent')
 
@@ -256,10 +252,4 @@
         _      -> return ()
 
 decodeCChar :: [CChar] -> String
-#ifdef UTF8
-#undef UTF8
 decodeCChar = UTF8.decode . map fromIntegral
-#define UTF8
-#else
-decodeCChar = map (toEnum . fromIntegral)
-#endif
diff --git a/src/Xmobar/Plugins/Monitors/Common/Output.hs b/src/Xmobar/Plugins/Monitors/Common/Output.hs
--- a/src/Xmobar/Plugins/Monitors/Common/Output.hs
+++ b/src/Xmobar/Plugins/Monitors/Common/Output.hs
@@ -3,7 +3,7 @@
 ------------------------------------------------------------------------------
 -- |
 -- Module: Xmobar.Plugins.Monitors.Strings
--- Copyright: (c) 2018, 2019, 2020 Jose Antonio Ortega Ruiz
+-- Copyright: (c) 2018, 2019, 2020, 2022 Jose Antonio Ortega Ruiz
 -- License: BSD3-style (see LICENSE)
 --
 -- Maintainer: jao@gnu.org
@@ -261,9 +261,10 @@
   l <- fromIntegral `fmap` getConfigValue low
   bw <- fromIntegral `fmap` getConfigValue barWidth
   let [ll, hh] = sort [l, h]
+      bw' = if bw > 0 then bw else 10
       scaled x | x == 0.0 = 0
-               | x <= ll = 1 / bw
-               | otherwise = f + logBase 2 (x / hh) / bw
+               | x <= ll = 1 / bw'
+               | otherwise = f + logBase 2 (x / hh) / bw'
   return $ scaled v
 
 showLogBar :: Float -> Float -> Monitor String
diff --git a/src/Xmobar/Plugins/XMonadLog.hs b/src/Xmobar/Plugins/XMonadLog.hs
--- a/src/Xmobar/Plugins/XMonadLog.hs
+++ b/src/Xmobar/Plugins/XMonadLog.hs
@@ -23,12 +23,7 @@
 import Xmobar.Run.Exec
 import Xmobar.Run.Actions (stripActions)
 
-#ifdef UTF8
-#undef UTF8
 import Codec.Binary.UTF8.String as UTF8
-#define UTF8
-#endif
-
 import Foreign.C (CChar)
 import Data.List (intercalate)
 import Xmobar.X11.Events (nextEvent')
@@ -86,10 +81,4 @@
         return ()
 
 decodeCChar :: [CChar] -> String
-#ifdef UTF8
-#undef UTF8
 decodeCChar = UTF8.decode . map fromIntegral
-#define UTF8
-#else
-decodeCChar = map (toEnum . fromIntegral)
-#endif
diff --git a/src/Xmobar/System/Localize.hsc b/src/Xmobar/System/Localize.hsc
--- a/src/Xmobar/System/Localize.hsc
+++ b/src/Xmobar/System/Localize.hsc
@@ -25,9 +25,7 @@
 import qualified Data.Time.Format as L
 #endif
 
-#ifdef UTF8
 import Codec.Binary.UTF8.String
-#endif
 
 --  get localized strings
 type NlItem = CInt
@@ -48,12 +46,8 @@
 getLangInfo :: NlItem -> IO String
 getLangInfo item = do
   itemStr <- nl_langinfo item
-#ifdef UTF8
   str <- peekCString itemStr
   return $ if isUTF8Encoded str then decodeString str else str
-#else
-  peekCString itemStr
-#endif
 
 #include <locale.h>
 foreign import ccall unsafe "locale.h setlocale"
diff --git a/src/Xmobar/Text/SwaybarClicks.hs b/src/Xmobar/Text/SwaybarClicks.hs
--- a/src/Xmobar/Text/SwaybarClicks.hs
+++ b/src/Xmobar/Text/SwaybarClicks.hs
@@ -23,9 +23,6 @@
 
 
 import Data.Aeson
-
--- import qualified Data.ByteString.Lazy as BL
-
 import GHC.Generics
 
 import Xmobar.System.Utils (forkThread)
diff --git a/xmobar.cabal b/xmobar.cabal
--- a/xmobar.cabal
+++ b/xmobar.cabal
@@ -1,5 +1,5 @@
 name:               xmobar
-version:            0.43
+version:            0.44
 homepage:           https://github.com/jaor/xmobar
 synopsis:           A Minimalistic Text Based Status Bar
 description: 	    Xmobar is a minimalistic text based status bar.
@@ -32,10 +32,6 @@
   description: Use Xft to render text. UTF-8 support included.
   default: False
 
-flag with_utf8
-  description: With UTF-8 support.
-  default: True
-
 flag with_inotify
   description: inotify support (modern Linux only). Required for the Mail and MBox plugins.
   default: False
@@ -206,7 +202,8 @@
                   stm >= 2.3 && < 2.6,
                   time,
                   transformers,
-                  unix
+                  unix,
+                  utf8-string >= 0.3 && < 1.1
 
     if impl(ghc < 8.0.2)
        -- Disable building with GHC before 8.0.2.
@@ -228,10 +225,6 @@
        build-depends: utf8-string >= 0.3 && < 1.1, X11-xft >= 0.2 && < 0.4
        other-modules: Xmobar.X11.MinXft
        cpp-options: -DXFT
-
-    if flag(with_utf8) || flag(all_extensions)
-       build-depends: utf8-string >= 0.3 && < 1.1
-       cpp-options: -DUTF8
 
     if flag(with_inotify) || flag(all_extensions)
        build-depends: hinotify >= 0.3 && < 0.5