This is in now way a scientific statement but i noticed when there is a conflict between the wallpaper plugin and the system settings with regard to the wallpaper being used, the errors:
(compiz:7240): GdkPixbuf-CRITICAL **: gdk_pixbuf_fill: assertion `GDK_IS_PIXBUF (pixbuf)' failed WARN 2011-10-24 21:52:05 unity.bghash BGHash.cpp:390 Passed in a bad pixbuf, defaulting colour show up in .xsession-errors If the same wallpaper is nominated in system settings and in the compiz wallpaper plugin, then those errors dissappear. At least that is the case for me using ATI graphics and fglrx -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/869293 Title: Compiz crashed on activating external monitor via nvidia-settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/869293/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs