Another serious bug, the most annoying one to me. Almost every time I close my inventory, right after having dropped an object (or several ones), even if I drop them inside a container, the game will freeze for a few seconds, lag, then work again with severe video glitches everywhere on the screen, at best, a pixel much. Texts become unreadable, mouse pointer is mutated in anything else but a mouse pointer. I then have no other choice to make a blind save, go back to windows, then launch the game again. This takes me 15 seconds, so it's no big deal. Just to mention it.
I'm under WinXP pro. 4Go RAM, DualCore, GTX275, Asus MB P4P deluxe. Latest patch, latest drivers, all versions af .net framework installed!