There seems to be a new graphical bug. Some objects appear to have a lot of banding.
e.g:
Grass (not the best demonstration, but there is significant banding on the grass in-game)
The game sometimes wouldn't load when I selected it in the menu. I wasn't able to load my save at all.
The exit button in the menu also didn't work for me; I had to alt+F4 to exit each time.
EDIT: I'm not sure if this is a driver issue since I recently updated them.