Still seeing this behavior with 1.4.5-1, totem-xine. I've used the Gnome menu (Debian -> Screen -> Save -> Disable XScreensaver) to disable the screensaver, and I am still seeing the blanking. I found that disabling DPMS in xorg.conf and restarting X helped to fix the behavior. Perhaps if gnome screensaver is not running, totem doesn't do anything to prevent screen blanking, thus allowing either xscreensaver or DPMS to blank the screen, even if it is supposed to fallback on xscreensaver events, which may not be enough to prevent DPMS from kicking in if neither screensaver is running.
James
