The backtrace looks like http://bugzilla.gnome.org/show_bug.cgi?id=320020 upstream which should be fixed on feisty, could you try on feisty if you get that problem (maybe with a liveCD)?
The backtrace looks like http:// bugzilla. gnome.org/ show_bug. cgi?id= 320020 upstream which should be fixed on feisty, could you try on feisty if you get that problem (maybe with a liveCD)?