Thanks for replying Nick. Actually,I only started using vStrip as somewhere I read it helped to prevent sync problems! I much prefer Smartripper for normal rips. I confess I've never tried using the internal routines. Think I will start experimenting with it from now on tho. Unfortuntaely, the problem exists on all players, and when I tried a second time the muxed files also were out of sync. Think I still have the logfile from that one if that will help. I still have the orignal rip on my HD - but do you think I should rip again but using internal routines? The rip has no trailers and i was reading the recent thread from Scruffyman and wondered if my sync probs might also be similarly related perhaps to besweet (altho this is starting to get out of my depth here!) in which case perhaps I can still use this rip. Many thanks Paul