The assertion is not relevant to this bug. xsession-errors is normally full of assertions from all sorts of apps. Switching to gnome-shell won't change that.
It's at least good to see you're getting the same error as myself and we're not dealing with different bugs... error_code 8 request_code 3 minor_code 0 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/879793 Title: No GTK theme applied on login, should be Ambiance Status in “gnome-settings-daemon” package in Ubuntu: Confirmed Status in “unity” package in Ubuntu: Invalid Bug description: On random occasions, logging into Ubuntu (Unity) there is no GTK/Gnome theme active. You only see what looks like stock icons and GTK theming. Logging out and logging back in again usually fixes the problem, and the Ambiance theme (or whatever) is then applied correctly. We have confirmation this is affecting multiple users in Ubuntu 11.10. However I personally used to see the problem occasionally in Ubuntu 11.04 too. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: nautilus 1:3.2.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6 Uname: Linux 3.0.0-13-generic x86_64 NonfreeKernelModules: nvidia wl ApportVersion: 1.23-0ubuntu3 Architecture: amd64 Date: Sat Oct 22 08:46:57 2011 ExecutablePath: /usr/bin/nautilus InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: nautilus UpgradeStatus: Upgraded to oneiric on 2011-10-21 (0 days ago) XsessionErrors: (nautilus:1944): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed (nautilus:1944): Gtk-CRITICAL **: gtk_action_set_visible: assertion `GTK_IS_ACTION (action)' failed (jupiter:1965): Gdk-CRITICAL **: IA__gdk_window_thaw_toplevel_updates_libgtk_only: assertion `private->update_and_descendants_freeze_count > 0' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/879793/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
