I am running the 10.3.4 beta with 0.7.2 on a 1Ghz Powerbook. My DiVx stuff plays fine. I have not had the chance to try a newish DVD yet, but my old test DVD with PCM audio gives the following along with a whole lot more...
main debug: looking for audio filter module
main debug: probing 1 candidate
main debug: using audio filter module "ugly_resampler"
main debug: using audio filter module "coreaudio_resampler"
main debug: found a filter for the whole conversion
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3696:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3696:0)
main debug: audio output is starving (192345), playing silence
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
macosx debug: stream has changed, refreshing interface
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3696:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)
coreaudio_resampler warning: AudioConverterConvertBuffer failed: [sz[–] (3688:0)