None. 30 hours in and I have experienced no game breaking bugs, and relatively few bugs at all.
My brother, on the other hand, has come across some sort of lens focusing puzzle in the Mages' guild quest that wouldn't work for him at all, and I believe it's the same one that
Daystar Clarion said:
The only game breaking one I've found so far, one that forced me to restart my game, was a side quest in the Mage's guild (something to do with cleansing the focal points or something).
Anyway, after that, I had unlimited magicka, and I'm not one for playing with a game breaking benefit like that.
Thankfully, my mage joined the guild pretty early, so I only lost a couple hours of progress.
this fellow had.
Anyway, 30 hours. I have no idea how long it's been since I spent thirty hours with the same game, with the same character, in such a short amount of time. Bugs or not, this game is
amazing.
EDIT: I guess it should be noted that I am on the 360 version and my brother is on the PS3 version. The PS3 version is having
far worse problems than anyone else at this point, especially considering the horrible framerate.