This is interesting... I use ProX3  and MEP on a regular basis but was travelling with a laptop that only had a new installation of ProX4. Working with long clips of MP4 video from a Hauppauge HD PVR, all the videos had audio getting gradually out-of-sync as the clip progressed on ProX4 (about 1/2 a second or so at the end of a 25 minute clip).

Have a dual-boot Win7 32 and 64, so just bought, downloaded and installed MEP18 (MX) on the 64 bit side as I wanted to make sure there wasn't a problem (have worked with these clips for a long time on MEP on other computers without problems). Audio is in sync. Every time.

If I open the project I created in MEP18 with ProX4, the audio continues to be in sync. I think there might be a frame table problem with ProX4, but the "recreate frame table" option isn't available on the project originally created with MEP18 when I right click on the object.

Anyone seen something similar? It is just too odd that ProX4 is out of sync but MEP18 works fine...

Thanks,

Cleber