I have tried "verify integrity of game cache" and "Defragment cache files". Did not do fix anything, despite downloading one file that I guess was missing. Didn't fix the problem.
The only way I'm able to get back into my game is to START A NEW GAME and manually load from there - EXTREMELY irritating to do that every time I start up the game.
It's stupid that I have to think of this bizarre solution JUST TO BE ABLE TO PLAY A GAME I PAID FOR.
Does anybody know of a way to get rid of this problem? I'd really prefer to just be able to launch Fallout, press continue, and play the game rather than have to start a new game and load from there every [censored] time.
EDIT: My system has an i7 2600k (Hyperthreading disabled), Nvidia GeForce GTX 590 (SLI enabled), 8gb of RAM... Not sure what else there is.
I tried re-installing New Vegas, didn't help very much. Is this at least a common issue? It would be slightly more comforting to know I'm not the only one who happens to have this problem