Windows Vista screen saver settings aren't saved

[rhubarb]

I'm having a weird problem with Vista x64. Everytime I restart, the screensaver settings are forgotten and the screensaver won't start. In the screensaver settings it defaults to 1 minute (but never actually comes on). If I change the timeout to something other than 1 minute, it works for that session. But as soon as I restart, it's back to 1 minute and doesn't work. Any ideas?