Are you sure you have not played with gnome-keybinding-properties or gconf-editor and might have changed that value? Nobody else mentionned a such issue and it's weird that the window manager would have go and do that change itself
** Changed in: metacity (Ubuntu) Assignee: (unassigned) => Ubuntu Desktop Bugs Status: Unconfirmed => Needs Info -- Spacebardoesnotworkafterupgradetoedgy https://launchpad.net/bugs/60472 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs