I found another bug. It appears the leaderboards for Forest 1-10 to 1-20 are broken! Strangely enough I can view all the other leaderboards just fine. I checked dark Forest & hospital. In those chapters all levels seem to work fine. Only from level 1-10 upwards it's showing either the wrong times or no times at all...

using -highdetail solves almost all problems for me, but I have a few left: (Using Lion 10.7.2 on a 2x 3.2 Ghz Quad-Core Intel Xeon with 10GB RAM:

* I can't save replays. It's hard to read on this resolution but it's [shift] right? When I hit it I see a white meat boy pop up. but it doens't seem to have saved, it's not in my replays. Or is that done in another way??

I have the exact same problems running in Lion.

Edit: It seems the Game Boy Warp zone does work, the other warp zones I found result in a crash right after the animation.