Just searched on screensaver, but nothing relavent came up.
So I haven't used LinuxMCE (its a test system) for 2-3 weeks but wanted to watch a movie so I did the update, upgrade.
Start watching the movie, and after several minutes, the screen goes blank. Press return and its back. Several more minutes and it blanks again. Seems like a screensaver to me.
Not sure why ?