I have just upgraded to My Movies 3 in 32 bit Vista and upgraded to TMT3. TMT2 works perfectly either integrated with MM3 or stand alone. TMT3 works fine as stand-alone when browsing to the video_ts file folder. But TMT3 crashes when played through MM3 integration. After I hit the play button, I get the MM3 splash screen then the crash. I get a "TMT stopped responding dialog and option to close the program or check for a solution. When I close the program I am returned to the Play screen. If I switch back to TMT2 integration, it works fine.
I have an Intel Quad Core 2.66 ghz with 4 Gig RAM with nVidea GT9600 video card and an Auzentech X-Fi Prelude sound card. The application in which the crash occurs is uMCEDVDPlayer.exe.