This happened to me twice now..Around 9-10pm in the evening, iphone clock goes up an hour..if i set it to manual, it shows the correct time, if its automatic it goes up by an hour. I set it manualy last night (to avoid alarm going off an hour ealier which happened to me a couple of days ago), checked again this morning around 7, it was showing 8 (1 hour ahead). got to work..checked again.. its fine now. Seems like somewhere between 10pm and 8am the clock goes whonky.. i'm on 4.3.3 and its a new replacement phone from apple. anyone else experienced this?