it just started doing this a day or two ago. when i turn it off, whether it be by slide to power down, holding home and lock for 8 seconds, or SBSettings power down option, it will turn back on after a second or two. ive found people with similar problems, but they arent turning on immediately after power down. is this a known problem? what do i do to fix it? any help would be awesome, because i need to have it at school but they will take it away if you have it on.... big problem right?