I had the same problem, but somewhere between updating my video drivers, rebooting, and starting a new game with a different faction, the problem seemed to go away. I have since been able to save and load without this issue. If the problem crops up again, I'll mention it here.
Edit: Ok, I just checked and it's back..... I noticed something else too. When I loaded it reset my avatar too. I was playing as the Knight-looking one, but the picture is now of the wizard when I loaded.
