Hey Nicolas have you tried to upgrade your gwibber release to the latest available in Natty? by the way, this issue could be also related to a parameter in your gconf settings.
** Changed in: gwibber (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/731630 Title: gwibber crashed with KeyError in setup_ui(): 'stream' -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs