From what I found when I googled random restarts on JB, the first thread on XDA was just saying it's when it wasn't wiped before updating to JB. I am 99% sure I did wipe it, unlocking and putting on clockwork mod does clear everything anyway? I won't worry about it yet, if it keeps getting bad I'll do a fresh install of JB again. Work and Home locations updated, thanks guys. I didn't even know that location history had distance travelled and hours spent at home/work/elsewhere, that's pretty cool. Even though I'm at work now and it's saying I'm half way across town.