Exported quicktime files have video & audio out of sync

I am using FCP with a Sony HVR-Z1E. All seems ok in my edit etc but if I try to export my edit to a quicktime file using the quicktime conversion option the audio and video are out of sync on quicktime. If I export using quick time movie option, all is fine as this file is played back by FCP. I have tried different settings but I cant get the audio to be in sync with the video. My settings are HDV 1080i50 on my 15" Macbook Pro
Thanks for any help
Regards Alf

You can open your "quicktime movie" (not qt conversion) in quicktime player. Simply control click on the file in the finder and choose open with... Try that and let us know if the file is in synch.

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