I have been authoring a DVD recently with DVD Studio Pro - to get the videos and audio (compression MPEG2/AIFF) in sync I needed to reduce the audio rate to 44.1 from 48. This is in spite of all I have read that the format for DVD should be 48. But when this was done (44.1) it played well on the MACs and I was able to burn a DVD that played on PCs, MACs, and desk-top players. But there have been a few caveats, first it does play with CyberLink's PowerDVD, Nero's player, MAC's DVDplayer, and most desk-tops I've tried, but does not play well in Windows Media Player (video image flickers with after image). I have muxed the disc at 3.2-6.0 bit rate, but my guess is that the audio stream is causing the problem. Also I cannot use Apack because it requires 48.0 for DVD audio conversion. Does any of this sound familiar to anyone, are there DVD authoring experts out there? Thanks, Mark "Be the world you want to see." (m.knox)