I'll try without gtk2-engines-gtk-qt. However I've some old stacktraces a little different from the first one, in which there is no reference to qtengine_style_register_type.
** Attachment added: "stacktrace_2" http://librarian.launchpad.net/6932061/ff3.log.bz2 -- firefox crash https://launchpad.net/bugs/95540 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
