@Arcsoft_Jason
A physical disk in the BD-ROM drive will play just fine. The ripped file--if launched by Win7's Movies library--has the funny playback. The very same ripped file will play just fine in TMT3 if you close down Media Center and simply open the file in TMT3. That's why I think there's a problem with the way Windows Media Center hands the file to TMT3, rather than with TMT3 itself.
The ripped files aren't ISO, since Windows Media Center's such a jerk about recognising and mounting these types of images without third-party help. The files were ripped using AnyDVDHD in file mode. (The files play fine if Media Center isn't involved, making bad rips unlikely.)