Anyone noticed any bugs with Gamecenter? I've only encountered 1 but it's quite annoying.

I've basically completed Cut the Rope perfectly (3 stars on every level). All of the achievements were unlocked in game but when I open the Gamecenter app some of the achievements weren't unlocked. For example, I've collected 300 stars so that achievement is unlocked but the Collect 150 stars achievement is still locked. Very weird.

Anybody encountered this or maybe got a fix?