The machine is running Windows 8 and has an nvidia graphics card, and all software is up to date. I've tried the files on another machine and they don't work there either.
The file I'm looking at right now is 1920x1080/60i, 16 Mbps. I also tried 60p, 24p and lower resolutions, all with the same results, i.e., it loads and starts, then the program crashes.
I produced the very same project as MP4 and it works fine.
Is there a known problem with the new build or am I doing something wrong?