Audio not in sync w/video

Linux x86_64 3.12.2-1 kernel snd_hda_intel
nvidia 331.20
AFP 11.9.900.152 opt/google/chrome/PepperFlash/libpepflashplayer.so
Chrome 31.0.1650.57
Note: no delay when using 11.2 r202 /usr/lib/mozilla/plugins/libflashplayer.so
This behavior is recent.

Sue,
Can you help me understand your instruction "Try extracting the audio in iMovie."?
I know how to extract the audio from a clip. But what audio am I extracting? I think I need you to elaborate a bit more.
The iMovie project is about 55 minutes long and I have inserted 4 aiff audio files within the project. For EACH of these audio file that I inserted in, I extracted the audio from the original clips where the audio file overlays.
For e.g., in one section of the project, one of the audio files played for the duration of 18 clips. The original audio for all these 18 clips were already extracted so that my aiff audio file takes precedence.
Is that what you had wanted me to do?
Meanwhile, I can't wait to try your tip on "...sharing the movie as a full quality QT file...". I will post the results as soon as I tried this.
Thanks !
Rob in Chicago

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