Syntax highlight is not applied to log files, IOError on opening smart_highlight/config.xml

[Vadim Rutkovsky]

TEST CASE:

1) gedit /var/log/kern.log

Result: no syntax highlight

2) Close gedit

Gedit closes with error (was not handled by apport):
Traceback (most recent call last):
  File "/usr/lib/gedit/plugins/smart_highlight/smart_highlight/__init__.py", line 44, in do_deactivate
    self._plugin.deactivate()
  File "/usr/lib/gedit/plugins/smart_highlight/smart_highlight/smart_highlight.py", line 88, in deactivate
    self.config_manager.update_config_file(self.config_manager.config_file, 'search_option', self.options)
  File "/usr/lib/gedit/plugins/smart_highlight/smart_highlight/config_manager.py", line 56, in update_config_file
    f = open(filename, 'w+')
IOError: [Errno 13] Permission denied: '/usr/lib/gedit/plugins/smart_highlight/smart_highlight/config.xml'

ls -la /usr/lib/gedit/plugins/smart_highlight/smart_highlight/config.xml:
-rwxrwxr-x 1 root root 382 2011-12-23 05:42 /usr/lib/gedit/plugins/smart_highlight/smart_highlight/config.xml
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ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gedit-plugins (not installed)
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Mon Feb 6 08:03:01 2012
SourcePackage: gedit-plugins
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.