I confirm this happens on latest Natty builds and I don't have any PPA's enabled. Please also look at bug 719481 (https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/719481). It looks similar.
This also affects: dconf-editor libcanberra-gtk Nautilus opening Applications folder ** Changed in: gnome-settings-daemon (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-settings-daemon in ubuntu. https://bugs.launchpad.net/bugs/719739 Title: gnome-settings-daemon: error while loading shared libraries: libgtk-3.0.so.0: cannot open shared object file: No such file or directory -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs