Large .dv file plays fine in Quicktime, but audio out of sync in iMovie??

hi,
i'm trying to convert some old analog 8mm tapes to digital. to do this, i'm using a sony trv320 camcorder with firewire feeding iMovie '08. i've imported an entire 2 hour tape into iMovie, and everything is fine except that at some point, the audio gets out of sync from the picture. i've opened the huge 24 GB .dv file in Quicktime, and everything is in sync, so I assume this is some kind of problem related to iMovie. i've done lots of searching on this and have made sure that the camcorder is sending 16 bit audio out. i also tried using mpeg streamclip to split the huge .dv file into smaller parts, but this resulted in the same audio sync problem (which is weird).
is my only option to manually import my tapes 10 minutes at a time? please say no
the most puzzling thing about this is that the huge .dv file is perfectly in sync all the way through when playing back in Quicktime.
i'm at a loss!! hope someone can help.

I've edited in FCP and exported with compressor with all the appropriate settings, to mpeg 2.
Double check to make sure that you edited in Anamorphic and also encoded as 16:9 video not 4:3 - also make sure you set the Track to 16:9 Letterbox in DVD SP.
What encoding rates did you use for the video and audio? Sometimes if the rates are too high it can cause drifts.
On the audio side, did you export the FCP as self contained and make the audio AC3? Also you can try just exporting the audio as an AIF and encode that as an AC3.
How did you burn the DVD (Speed and Media used?) Sometimes bad burns/media can cause issues.
Also look at these threads
http://discussions.apple.com/thread.jspa?messageID=3131142&#3131142
http://discussions.apple.com/thread.jspa?messageID=1872235&#1872235
http://discussions.apple.com/thread.jspa?messageID=1363574&#1363574
http://discussions.apple.com/thread.jspa?messageID=1086775&#1086775

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http://discussions.apple.com/thread.jspa?messageID=3131142&#3131142
http://discussions.apple.com/thread.jspa?messageID=1872235&#1872235
http://discussions.apple.com/thread.jspa?messageID=1363574&#1363574
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