HDV MPEG2 Video Playback in QuickTime - frame rate too fast!!

Hello All,
I'm having a very strange problem which just began this past week when I upgraded to QT 7.2 (darn me, I'm a video pro, I should have known better than to do this mid-project!). I am editing a film with HDV content: 1280 x 720 pixels, MPEG2 video (.m2v file type).
I have the MPEG2 plugin for QT.
When I open the file in QT Player, it plays the video almost 2.5 times faster than the audio, increasing the frame rate to do so. For example, if I view the Movie Properties for one particular file, and compare the sound track to the video track, it will claim that that the sound track has a duration of 7:03:24, whereas the video duration has a duration of 2:49:27. When watching the video, it plays it back too fast. When I import the file into Final Cut, the same "sped up" file is viewed.
I think this is a QuickTime specific problem because I downloaded VLC Media Player (which can also open MPEG2 files) and it opened and played the same MPEG2 file perfectly and at the correct speed.
I tried uninstalling and downgrading to QT 7.1.6 (and then re-installed OS 10.4.10) - but the problem still exists. So there must be something else that was installed in this QT update that I haven't been able to figure out that is causing this very weird problem.
I'm at a standstill with my FCP project because all the files it refers to in my sequences use the same QT engine - so all my video files are playing back too fast. Yikes!
Please can anyone help me or provide any insight, I'm happy to try anything or post more info.
Thank you,
Catherine
P.S. I'm going to post a similar thread over with the FCP folks to see if they have heard of any similar problems.

Sorry to dig up an old post, but I am having the same problem. Does anybody know a solution, it seems to occur on all MP2 movies, HD or not.
Ben

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