My N7 just updated to 4.2. I also have email synced with work so there's a pin lock code. I thought this meant I couldn't change the lock screen... swiping any which way does nothing. Pin code just unlocks. Then this morning the machine acted weird for a bit and now below the lockscreen clock it now tells me the time in Adelaide. Not much use to me in London. How do I get rid of that? I tried dragging to remove, it went but then as soon as the lockscreen came on it was back again. Help!