Well this is a bummer, I just encoded a title from a DVD (using Handbrake):

MP4 file container, H.264 (x264) Video, AAC (faac) Audio, Chapter Markers
source: 720x576 output: 704x400
Video: Encoder H.264(x264) Target size: 700(MB)(3960(kbps) abr)
Audio Track 1: English(AC3)(2.0 ch) Encoder: AAC (faac) Mixdown: Stereo SampleRate: Auto(khz) Bitrate: 128(kbps), DRC: Off


Saves to .m4v but WON'T play on device.

Any ideas on why it won't play?

EDIT: I installed the codec pack from here: http://talk.maemo.org/showpost.php?p=397776&postcount=1 but still no dice