Comment 97 for bug 101943

Just confirm that I've been hited by this bug, "nvidia" driver and it does not happen if visual effects are not enabled. I have tested all the screensavers (from a terminal, just keying /usr/lib/xscreensavers/whatever) and the following ones display the bug:
xrayswarm
interaggregate
braid
whirlwindwarp
substrate (this one works for a few seconds before hanging)
zoom (this does not exactly hang but is very very slow)
imsmap
mismunch
I have used gconf-editor to remove all these from the ramdom screensaver (not a very good solution, since the configuration xml file is reset just opening the gnome-screensaver configuration and all changes are lost). All are included in xscreensaver-data-extra package.