I'm at my mom and dad's place right now for Thanksgiving running PCLinuxOS Phoenix Edition from a live USB, and I've been getting this little bit of weirdness, too. It's already happened twice since we've been here, as I've been watching the weather online (severe storms here in the Ozarks last night -- thunderstorms, tornadoes, etc. -- and they're calling for wintry precipitation here for Thanksgiving, fun fun!) and had a couple such interruptions myself like Joechimp mentioned, and both times have been in the middle of typing something fairly rapidly. But it does it just once and it's fine after that. Weird...