gwibber doesn't start : crash on startup

[Nicolas DERIVE]

Binary package hint: gwibber

Here is the traceback :

Traceback (most recent call last):
  File "/usr/bin/gwibber", line 55, in <module>
    from gwibber import client
  File "/usr/lib/python2.7/dist-packages/gwibber/client.py", line 3, in <module>
    import gtk, gobject, gwui, util, actions, json, gconf
  File "/usr/lib/python2.7/dist-packages/gwibber/gwui.py", line 208, in <module>
    class WebUi(webkit.WebView):
AttributeError: 'module' object has no attribute 'WebView'

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gwibber 2.91.2-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-9.22-generic-pae 2.6.37-rc5
Uname: Linux 2.6.37-9-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
CheckboxSubmission: c4273c0f4f2b8d26cd6bf31cadfd2912
CheckboxSystem: a871981cb5bdf4d6ebd55be46becf77e
Date: Thu Dec 16 12:03:54 2010
EcryptfsInUse: Yes
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/bash
 LC_MESSAGES=fr_FR.utf8
 LANG=fr_FR.UTF-8
 LANGUAGE=fr_FR:fr:en_GB:en
SourcePackage: gwibber