I'm running the most up-to-date version of the game.

I had very mild bug problems for most of my first playthrough (compared to the problems others have had). However, as I got closer to Level 30 I started getting more and more CTDs. Sometimes they were associated with fast travel (having just arrived), other times not. But their frequency increased more and more until I just said "screw it" and went back to Hoover Dam and beat the game. Then it crashed during the closing cinematic.

I started a new character as a test, and have hit Lvl 5 with no issues.

Does this sound remotely like a problem anyone else is having? Is my first character just irredeemably messed up? I'd like to use him for Dead Money when it finally comes to PC, since I don't think I have the patience to grind another guy up to 25+. Is there something that could be done to save it?

Thanks for any input!