I haven't played this in a few years and I'm wanting to get the PSN version.
If I remember correctly, there was some sort of game-breaking glitch that occurred if you saved at the "ice cream factory". I don't remember exactly what it was, but I remember that it really screwed up your game if you saved there. Did they fix it?
Edit: I think it was known as the Cherry Popper glitch.
--- I went to a club last night. They played The twist, I did the twist. They played Jump, I jumped. They played "Come on Eileen"...I got kicked out.