I have been mixing a while, and have never encountered this before.

I have a file, which while it sounds perfect when mixing using MM, after being exported to WMA format, it is out of sync slightly.

I have tried to expot the same playlist several times, and it sounds the same.

Is this what has been described in an earlier post as a poorly encoded file? Its an MP with 320kbps encoding.

Wierd, I know, but have you heard of any other occurence?