accerciser failed to start on Quantal: AttributeError: 'VPaned' object has no attribute 'set_data' in _populateUI

[Jean-Baptiste Lallement]

On Quantal accerciser fails to start:
$ accerciser
Traceback (most recent call last):
  File "/usr/bin/accerciser", line 50, in <module>
    accerciser.main()
  File "/usr/lib/pymodules/python2.7/accerciser/__init__.py", line 35, in main
    main = Main()
  File "/usr/lib/pymodules/python2.7/accerciser/accerciser.py", line 62, in __init__
    self.window = AccerciserMainWindow(self.node)
  File "/usr/lib/pymodules/python2.7/accerciser/main_window.py", line 51, in __init__
    self._populateUI(node)
  File "/usr/lib/pymodules/python2.7/accerciser/main_window.py", line 110, in _populateUI
    paned.set_data('last_position', paned.get_position())
AttributeError: 'VPaned' object has no attribute 'set_data'

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: accerciser 3.4.1-1
ProcVersionSignature: Ubuntu 3.4.0-3.8-generic 3.4.0
Uname: Linux 3.4.0-3-generic x86_64
ApportVersion: 2.1-0ubuntu1
Architecture: amd64
Date: Wed May 30 09:05:05 2012
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: accerciser
UpgradeStatus: Upgraded to quantal on 2012-01-31 (119 days ago)