[xubuntu-users] Certain keyboard commands suddenly failing

[MR ZenWiz]

After today's update in Precise Xubuntu, <alt><f4> no longer closes
any windows.  It is still listed as the keystroke combination for
closing a window in the Window Manager list, but it flat out does not
work in any window at all.  I noticed that in Firefox, <ctl>Q works,
and in LO <ct;><shift>Q works, but not he windows command.

What happened?

MR