MP4 Video from Flip Ultra having Audio Sync Issues

All of sudden I've started having audio sync issues with the mp4 footage exported from the The Flip Ultra camera. Ive tryed the mp4 footage in both windows 7 and Mac OS X and i'm having the same audio issue but when I watch in the flip software or in iMovie no issues. Any know why this has just started happening?

Work through all of the steps (ideas) listed at http://ppro.wikia.com/wiki/Troubleshooting
If your problem isn't fixed after you follow all of the steps, report back with ALL OF THE DETAILS asked for in the FINALLY section, the questions at the end of the troubleshooting link... most especially the codec used... see Question 1

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