I can confirm the problem report. It occurs on a Dell 490N with a "nVidia Corporation NV44 [Quadro NVS 285]" card with the proprietary nvidia driver and two monitors.
I can see the gtk-window-decorator running and I have similar entries in .xsession-errors: gtk-window-decorator: Could not acquire decoration manager selection on screen 0 display ":0.0" /usr/bin/compiz.real: No GLXFBConfig for depth 32 /usr/bin/compiz.real: No GLXFBConfig for depth 32 /usr/bin/compiz.real: No GLXFBConfig for depth 32 inotify_add_watch: No such file or directory -- gtk-window-decorator does not display borders https://launchpad.net/bugs/88589 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs