Had the issue with the graphics crash but was running ok using the d3d9 flag (still could not alt-tab unless I ran in windowed mode). All of sudden tonight I'm able to get to the character selection screen, but loading any map after that results in a hang and/or crash. Performed a verification and still have same problem.
This did work for me. After getting in I readjusted all my settings and exited the game again to see if it was a consistent fix. Back to receiving errors and unable to start game. This will get you into the game but it may not be a permanent fix for the problem.