Just to document a workaround for this annoying bug: switch to a text VT and "kill -9" the gnome-shell process. It will automatically restart and resume managing your windows.
Or, use the fallback session if you don't want to be bothered by doing this several times per hour :) Thanks, Bill Gribble -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org