How to fix Gedit LaTex Plugin error while saving BibTex

Gedit (3.4.1) gives the error below while saving a BibTex file (Ubuntu 12.04). The saving works fine, apart from the error popping up.

'bibtex-error'

  Traceback (most recent call last):
  File "/usr/lib/gedit/plugins/latex/util.py", line 116, in decorated_function
  return function(*args, **kw)
  File "/usr/lib/gedit/plugins/latex/bibtex/editor.py", line 141, in __parse
  self.remove_markers("bibtex-error")
  File "/usr/lib/gedit/plugins/latex/editor.py", line 493, in remove_markers
  type_record = self._marker_types[marker_type]
  KeyError: 'bibtex-error'

How to fix it?

1. open /usr/lib/gedit/plugins/latex/bibtex/views.py
2. change the line - to +

# add grouping controls to toolbar
 
- self._item_none = Gtk.RadioMenuItem.new_with_label(None, _("No Grouping"))
+ self._item_none = Gtk.RadioMenuItem.new_with_label([], _("No Grouping"))
  self._item_type = Gtk.RadioMenuItem.new_with_label((self._item_none,), 
                    _("Group by Type"))
  self._item_author = Gtk.RadioMenuItem.new_with_label((self._item_none,), 
                    _("Group by Author"))
  self._item_year = Gtk.RadioMenuItem.new_with_label((self._item_none,), 
                    _("Group by Year"))