I have the same problem with a Nvidia GeForce 6600 and 8400 GS. Besides the Braid screensaver there are also others in the xscreensaver-data-extra xscreensaver-gl-extra packages that will do the same. However I think this is a Compiz bug because all screensavers work fine with Compiz turned off.
I have the same problem with a Nvidia GeForce 6600 and 8400 GS. Besides the Braid screensaver there are also others in the xscreensaver- data-extra xscreensaver- gl-extra packages that will do the same. However I think this is a Compiz bug because all screensavers work fine with Compiz turned off.