I had a few weird small things - I was using Gnome on the desktop and after the update I couldn't mouse click on anything (MS wireless mouse), but all works in Unity. One of my ssh keys stopped working, the font (possibly consolas) i was using in the terminal stopped rendering nicely and for a while Terminator thought a pipe symbol was a < (despite it being ok elsewhere). I am using an nvidia card and have had no issues with that.