While the PowerBook models that operate at 1.67GHz are qualified to run Final Cut Pro 5, testing has shown that there may be dropped frames if you are working with DVCPRO HD 1080pA24 media.
Because the 1080pA24 media on tape is actually recorded at 29.97 interlaced frames per second (fps), Final Cut Pro has to remove the redundant fields, resulting in a 23.98 fps movie on your scratch disk. Performing the on-the-fly removal of redundant frames is a very performance-intensive operation, and the 1.67 GHz PowerBook G4 models may drop frames when attempting to Print to Video in the 1080pA24 format.
This document will be updated as more information becomes available.