I tried to delete them completely (remove the kext, remove the receipts, clear the kext chaches) and re-install the drivers, still doesn't work. I have these problems on both my PowerBook and PowerMac, so I suppose I'm doing something wrong while installing the drivers. The USB ports on the Macs seem to be fine as well since other devices work perfectly. The only thing that happens when I plug it into a Mac is the power LED lighting up. The board itself seems to be fine, it works great on a Windows machine (ironically), it is recognized and I can upload sketches to it etc. I can't even see anything listed under 'USB' in System Profiler when the board is connected. I've tried the driver that comes with Arduino 0003 (v2.0.1) and both 2.1.0 and 2.2.0 from the FTDI website, but no joy.
Also, the driver doesn't show up in 'kextstat' or under 'Extensions' in System Profiler. and nothing happens, no entry is created in /dev. I install the drivers, reboot, run macosx_mand, reboot again, plug in the board.
Apparently, I can't get my Macs to recognize the Arduino board.