I've had the same thing as smudged - no freezes at all over the weekend until yesterday, when it froze like 5-10 times in one night. I hope that was them poking around the leaderboard server, or something, and not a permanent thing. This game is going to be a long enough grind as it is, without 40% of your XP going to oblivion.
Really pissed me off because one of those times was when it was about to load the victory screen for a platinum medal run on the annoying Colonel Ketchup level.
