Comment 6 for bug 387656

Every screensaver shipped has hidden settings capabilities, not attainable through gnome-screensaver.

I vote on importing functionality from the xscreensaver package into the gnome-screensaver package to modify screensaver parameters.

Two small issues with gaving gnome-screensaver and xscreensaver installed:
1) Currently you need to kill gnome-screensaver to run xscreensaver or else it will not run. Short of uninstalling gnome-screensaver I am not sure how to simply disable it (I would have thought it could be done "System > Preferences > Startup Applications" but it's not there.

2) gnome-screensaver and xscreensaver have the same .desktop file and tooltip, so when thay are both installed you cannot tell them apart in the applications menu.