Yes I use an external drive to rip in Windows. The external drive I use is formatted in NTFS, therefore I can write to it when I'm in Windows (bootcamp) and I'm able to read it in Leopard-but not write to it-no need to reformat, OSX reads it fine. Then point Handbrake to save the MP4 output to your osx drive (internal or external)-not to the external drive you just used in Windows.
I found this to be the best solution to the incompatibility.
ahh, so you use 2 different externals? You rip inside windows to one external, then read the file inside osx, and rerip to another external using handbreak?
The HDD you rip to inside of windows is formatted as NTFS, what is the HDD for the mac formatted as? I assume you are not using FAT32 due to file restrictions right?
Thanks for all your help.