Unknown Error The file ‘/usr/share/gnome/help/user-guide/en_CA/user-guide.xml’ could not be parsed because one or more of its included files is not a well-formed XML document.

[WaltSullivan]

I was running Mouse Preferences and clicked on Help. Instead of Help, a window popped up saying:

Unknown Error
The file ‘/usr/share/gnome/help/user-guide/en_CA/user-guide.xml’ could not be parsed because one or more of its included files is not a well-formed XML document.

$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

$ apt-cache policy language-pack-gnome-en-base
language-pack-gnome-en-base:
  Installed: 1:11.04+20110607
  Candidate: 1:11.04+20110607
  Version table:
 *** 1:11.04+20110607 0
        500 http://ca.archive.ubuntu.com/ubuntu/ natty-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ natty-security/main amd64 Packages
        100 /var/lib/dpkg/status
     1:11.04+20110421 0
        500 http://ca.archive.ubuntu.com/ubuntu/ natty/main amd64 Packages

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: language-pack-gnome-en-base 1:11.04+20110607
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
Architecture: amd64
Date: Wed Sep 28 15:03:34 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: language-pack-gnome-en-base
UpgradeStatus: Upgraded to natty on 2011-09-28 (0 days ago)