I'm seeing this after Alt-F2+r with gnome-terminal as well. When this happens, I can still interact with the tabs, move between them using the keyboard (Ctrl+PgUp/PgDn) etc but cannot resize or move the gnome- terminal window (the title bar is there, but it behaves as if it were invisible).
$ gnome-shell --version GNOME Shell 3.8.4 $ gnome-terminal --version GNOME Terminal 3.6.1 cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=13.10 DISTRIB_CODENAME=saucy DISTRIB_DESCRIPTION="Ubuntu 13.10" -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1215798 Title: losing windows on Ubuntu 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1215798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs