bah, sorry for the noise, but g-s 2.16 is in edgy, of course. I'll mark
this fixed for now, please reopen if the issue still persists after
upgrading to Ubuntu 6.10.
** Changed in: gnome-screensaver (Ubuntu)
Status: Confirmed => Fix Released
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Screensaver breaks mouse and keyboard input
https://launchpad.net/bugs/48108