I recently got a new system with Win7, CS4, and Matrox Axio LE. I have the latest Axio utilities installed and I installed the 4.2 version of Premiere Pro. I also installed the Sony XDCAM drivers for the PDW-U1 disc reader and the proxy videos play fine.
I have imported the same MXF files on an older, slower, less RAM, XP PRO system using CS3 without any problems.
The video was shot with a Sony PDW-F355 XDCAM HD at 35Mbit.
I'm curious if I'm missing a codec, driver, or something similar. I did get a "DirectShow" error at one point.
If anyone has any ideas, even ridiculous ones, I'm willing try anything.