Holy shit lol, check out this poor guy's post.
Still no word from iD\Bethesda on a hotfix?
I reached level 12 on Ultra Violence with 100% secrets and my game crashed to desktop for the first time (during a quick save I believe).
I reloaded my game and was stuck in Dev mode, tried all the fixes without any luck, this was four days ago.
I bit the bullet today deleted saves (deleted entire doom folder in my documents) started again reached level 3 saved game exited went the shops got home reloaded and bang developer mode was back, WTF is going on?