** Description changed:

  Zenity was updated a few days ago. Until then there was a bug with
  --checkbox, which is fixed now :-) But another bug was introduced:
  zenity's option to render html does not work. A similar bug was squashed
  in OpenSuse last year, and is still there in Fedora and Centos. But
  --html works in all versions of the Ubuntu flavours from 12.04 LTS
  'Precise' to 15,04 'Vivid', and worked in 'Wily' until this last update
  of/to zenity 3.16.3.
  
  The error output states:
  
  "This option is not available. Please see --help for all possible
  usages."
  
- The bug that was fixed last year was fixed in OpenSuse by compiling with
- WebKit. Maybe that works also now, maybe another tool is necessary now
- to add capability for html with the option --html.
+ The bug that was squashed last year was fixed in OpenSuse by compiling
+ with WebKit. Maybe that works also now, maybe another tool is necessary
+ now to add capability for html with the option --html.
  
  Arx Cruz knows which tool to use (if no longer WebKit).
  
  You can run the following bash shell-script to test if it works or not.
  -----
  #!/bin/bash
  
  echo "<h1>HTML headline</h1>
  Hello World" | zenity --text-info --html --filename=/dev/stdin \
  --width=$(($wadd+640)) --height=$(($hadd+400)) \
  --title "$btitle" \
  --ok-label="Go" --cancel-label="Quit" \
  --checkbox="Check this box if you are ready to go"
  -----
  It should create a window similar to that in the attached file 
'correct-rendering-html-precise.png'
  
  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: zenity 3.16.3-1ubuntu1
  ProcVersionSignature: Ubuntu 4.1.0-2.2-generic 4.1.3
  Uname: Linux 4.1.0-2-generic i686
  ApportVersion: 2.18-0ubuntu5
  Architecture: i386
  CasperVersion: 1.362
  CurrentDesktop: LXDE
  Date: Sun Jul 26 19:29:08 2015
  LiveMediaBuild: Lubuntu 15.10 "Wily Werewolf" - Alpha i386 (20150725)
  SourcePackage: zenity
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1478386

Title:
  zenity's option to render html does not work

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