Synch problem exporting and importing audio

Hi all!
I live in Pal land.
Had this problem a long time now. This is the deal:

I have an audio track (48KHz 16bit, same settings in project)
Mark In and Out on timeline.
Choose Export/audio to aiff. (48KHz 16 bit setting)

Import that audio back in to project.
Drop it under the original audio (for comparison), play it back and what do you know, the imported audio is lagging the longer it plays
This is no issue on a short commercial but the longer the audio clip, the worse the lagging.

This exact problem happens if I send an audio clip to soundtrack, save it (with or without any effects) and play it back.

Why Oh why is this happening???

This started with FCP ver 6. I thought it had to do with my Mac at work and hoped that it would dissapear with ver 7. But now I just purchased version 7 for my home office and Installed it on a brand new Mac Pro and the problem lives on....

My solve for audio is exporting the audio, importing it to another Mac that runs Pro Tools, fix the audio, bounce it out and bring the file in to my project...
Now that is not the optimal workflow to say the least...

I just can't be alone with this issue, please tell me it isn't so!

i don't really know why that's happening, sorry.

what sort of media are you using in your timeline?
can i ask why you are exporting to AIFF?
what happens when you export as a QuickTime Movie?
have you tried exporting with QuckTime conversion and choosing AIFF as your format?

what is the fix you are doing in ProTools?

Hey guys,

I'm coming up with the exact same problem. Same exact thing with settings
I have an audio track (48KHz 16bit, same settings in project)
Mark In and Out on timeline.
Choose Export/audio to aiff. (48KHz 16 bit setting)

Import that audio back in to project.
Drop it under the original audio (for comparison), play it back and what do you know, the imported audio is lagging the longer it plays
This is no issue on a short commercial but the longer the audio clip, the worse the lagging.

I'll answer (for my side of the project) the questions nick has asked.
- ProRes 422 HQ
- I've tried quicktime and aiff and it happens with both of these formats
- The same issue happens when i select the suggested 'QuickTime' conversion.

My part time solution is as follows: I would duplicate the time line, turn off the video tracks and export it that way. This will give me a black video with the proper audio length. But this solution gives me a bigger file than is really needed. Since this needs to be uploaded, an only audio file would be ideal.

Any suggestions are appreciated!!

Best,
Hus