So i am aware of a few bugs within the thieves guild. The first being that the fence Tonilla doesn't give you the quest to recruit the cat caravans as fences. Secondly, Devlin refuses to buy your last larceny target, the eye of the falmer gem. If you know any way to get around them please share it here. I have been forced to start another new game and I also deleted all patches to try to avoid this. I remember my very first game I didn't have a single bug so I'll keep you posted if I am successful but none the less lets compile strategies for avoiding bugs here.