Peerless,

I think bwb is using a device that streams files from pc to tv (or in this case, passing through the DVD player to get to the tv).

My guess is that the pc gets too busy or streaming device can't handle the large amount of data, which results in A-V falling out of sync.

bwb: if the file played perfectly on your pc then a burned disc should play as well on your DIVX device.