I have not had any problems at all going under water(xbox 360) but every once in a while like a 5 foot by 5 foot (in game size) square of the land will go black. I have had the game since midnight on release date and have never seen this happen. Have seen it 5 times since new patch. Also, i dont know if this happened b4, but when i bought the house in riften it glitched on me. I was able to afford all upgrades except the enchanting table. I went to the house and everything was fine. Finaly went back and purchesed the table, and as soon as i got back to my house, my house carl attacted me. tryed re booting in several diff. points. Even went back to b4 i bout enchanting table and rebought it. Still happened. Se doesnt say anything and i cant talk to her b4 she wips out her sward and starts swinging. Too bad i had to split her dome open. and only got a measily 300 gold for an inheritance. This didnt hurt my feeling, since i dont use followers. But thought everyone should know