Confirmed since I'm also seeing this (in my case on firefox 3.6.8+build1+nobinonly-0ubuntu2 - and a lot of other programmes). Note I do not have appmenu-gtk installed - it was installed but I apt-get removed it.
Ah - I think I might see what's happening here. 1) Installing appmenu-gtk adds /etc/X11/Xsession.d/80appmenu 2) This sets the environment variable UBUNTU_MENUPROXY to libappmenu.so 3) If you remove appmenu-gtk the variable is still set - and you get these errors 4) apt-get remove on appmenu-gtk leaves behind the /etc/X11/Xsession.d/80appmenu causing these errors to persist. Dave ** Changed in: firefox (Ubuntu) Status: New => Confirmed ** Package changed: firefox (Ubuntu) => gtk+2.0 (Ubuntu) -- Gtk-WARNING **: Failed to load type module: (null) https://bugs.launchpad.net/bugs/598780 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gtk+2.0 in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs