I guess I should say that this post contains minor spoilers, but it's for an early part of the game.
When I come back to Stinky's diner, I find there's a pretty serious glitch in the conversation between Flint Paper and Girl Stinky. It goes fine until Sam and Max start doing a pretend investigation. Sam growls out a question, and Max answers, but then instead of letting me choose a dialogue option, the camera changes and Max says "Sam! You're supposed to say something!" Then Sam repeats his question, and it does the loop again. The only way out of it is to quit the game.
I've tried leaving the area and coming back again and it stays the same.
Do any of you know how to stop this from happening?