I have re-rendered the DL clip in Premiere as well with the same issues. Most of the time, the DL works great… but going back through a few projects I’ve noticed some things are off, especially when masking/rotoscoping is done.
I WISH I could get CS6. The company I work for has no intention of upgrading any time soon (we’re not even getting CS5.5 until Q1 2013!!! CS6 will be out almost a full year before we get the version before it! It’s been a very frustrating year…