My game has now completely messed up. I think it is related to the save file bug.
Basically I finished episode 5 (which seemed to think I had let Clem eat human meat - WRONG!) and decided to replay the entire series. To be safe I did a clean install and wiped everything inside The Walking Dead folder in My Documents/Telltale Games. Completed episode 1 and 2 fine, got a few scenes into episode 3 and then I quit. Now when I start the game, my save file seems to think I only completed episode 1. I have to play episode 2 again. Also, now in the intro to episode 2 it thinks I saved Doug... when I didn't.
I'm completely abandoning this game now until I hear that Telltale has fixed it. From the look of these forums, and the ones on Steam, many people are having these problems. There is no fix that works. The workaround mentioned in this thread still results in some choices being read wrong, and it doesn't stop the game from corrupting your saves again in the future. The only people who can fix this is Telltale.... will they bother?