gnome-screensaver currently needs a migration script to convert xscreensaver's screensaver configuration file format to gnome-screensaver's file format. This migration script has to be run when the xscreensaver's screensavers are installed, and adding gnome-screensaver specific migration scripts to xscreensaver seems bad. Instead, it would be better if gnome-screensaver just did the migration using libxslt or something at runtime.
What about a trigger in gnome-screensaver's spec that gets run when xscreensaver* are installed?
migrate something, red pill, blue pill. whatever.
should work in tomorrow's rawhide.