I've been testing my game on as many platforms as I can get my hands on... and it seems to run great on all of them but the PPC platforms. On Intel Macs, Windows and Linux PCs I get well over 100fps (on the oldest hardware I could find that still had a 3D card, I got as low as 70fps). But on PPC Macs, it doesn't ever go above 30fps. I've tested it on a Quad G4 with a 6600GT, and a Powerbook G4 (with an ATI 9700), and both are stuck around 30fps, no matter what resolution or graphics settings I specify (e.g., 800x600 gives the same number of FPS as 1280x1024). Any ideas? Could it be a bug with LWJGL, or maybe just an issue with the universal binaries?