Missing Audio when Exporting to HD

Hi,
I have been trying to find a solution to missing audio for sometime and there are many discussions on this forum regarding this topic. I have an external drive and in the past I have lost audio, I guess because the event and the project were on different drives, I have resolved that. Also, the problem that I have is not related to the speed of a clip or that I have more than 10GB in my events (I don't). There have been other audio issues and I have always been able to resolve them but this one has me stumped! I thought that perhaps the graphics card was not up to the task but this has just happened and now I am confused.
I have just completed a project that was only 3 minutes long 403.5 MB. The movie was imported to iMovie from my video camera and listed as an Event, I also used movie clips and stills from iPhoto, I added titles and transitions. I then exported the movie to Media Browser (mobile size) so that I could import it into Garage Band to make an soundtrack. I then exported the soundtrack as an AAC to iTunes (as I have read that there are issues with MP3 and audio missing). I then opened iMovie and dragged the soundtrack into my project and republished the completed project to Media Browser in the HD size. No problem all works well, I was really happy! Onwards I thought and get another 2010 video finished, wrong!
On my next project I have done everything that I have described above, this time the project is only 349.8 MB (smaller). The audio on the HD size has failed. I have copied all the files onto my desktop and reimported everything. I have tried exporting using Quicktime or as a Movie but still no audio. I have found that the 'consolidate media' is grayed out when I have all my clips in the project editor, because they are all on my hard drive. As soon as I add the iTunes track that I have exported from Garageband the consolidate media option becomes available. If I select this I then get the message that the iTunes track cannot be copied as it is not on my hard drive! It is on my hard drive (I disconnected all external drives so that there would be no confusion!).
I cannot understand how the first project worked and the second smaller project failed using the same process! I thought that I would share this information with the forum in the hope that perhaps a solution can be found. I am able to publish the second project to my mobile me in the large and mobile sizes, it would be good to have the HD size for a DVD. There seems to be no logical pattern to the audio disappearing on export. Your thoughts or help would be very welcome.
Kind regards,
Watchthebat.

In Soundtrack if you have selected to use only channel 2 of a stereo file (right click on stereo file and select mono->channel2) you will hear channel 1 when you export. Its a massive bug.
Could that be the source of your problems? The bug can certainly create exported mixes that sound like stuff is missing.
There's a recent thread around here about this.

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Edited by: Christoph Bergemann on Aug 27, 2011 7:12 PM
Edited by: Christoph Bergemann on Aug 27, 2011 7:13 PM

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Message was edited by: John Cogdell

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**Missing Audio when Exporting to HD**

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Missing Audio when Exporting to HD