Version: (using KDE KDE 3.3.0) Changing the date of the machine (I moved it back 3 months) makes all windows unmovable. Kwin still runs, moving to another desktop using the context menu still works for example. Moving/resizing (I even tried starting the actions from the context menu) of all my windows stops working untill I kill and restart kwin. To reproduce; start kcontrol, open the system->date time kcm and (as root) move the date to (for example) april. Press apply. No windows (even new ones) are movable anymore.
http://freedesktop.org/bugzilla/show_bug.cgi?id=1539
*** Bug 69491 has been marked as a duplicate of this bug. ***