Print Screen isn't working (7.0.5)

["Andrew" <knoppix@rngresearch.com>]

Dear Klaus et al,

Please advise!  Neither Ctrl+Print Scr nor Alt+Print Scr seem to do
anything.  In prior versions they would capture from the screen and
present a dialog box asking what to do with the image.

I'm using default settings, which means lxsession, metacity, lxpanel,
pcmanfm.  (Compiz will not run on this machine, so it is like using no3d
cheatcode.)

Also, Alt+F1 and Alt+F2 don't do anything, either.  (They used to launch
the lxpanel menu and run dialog.)

(Ctrl+Alt+F1, etc. do work just fine.)

Any advice on how to capture screen shots?  Thank you.

Best regards,
Andrew