I have a jailbroken and unlocked iphone 3G running on 3.0 (haven't updated to 3.1 yet). Every once in a while, and I'm not sure what triggers it, I lose some of my settings: all the icons that I organize in a particular manner suddenly are placed in their default positions, the screen brightness goes to default (50%?), the wireless is turned on, etc. Does anyone else have this problem? Any solutions?