Audio drops out randomly in FCP5

Hello,
I'm running FCP 5.0.4 on a G5 OSX 10.3.9 and a AJA io LA with current firmware v1.1 and driver v2.1.
When playing a sequence, audio will be fine. Going from AJA through mixer, to speakers and decks. Then the audio will cut ot completely, but video will continue to play. The meters in FCP show the audio is there, but nothing is getting to the mixer, and therefore nothing is getting onto tape, or coming out of my speakers. This problem occurs in every project we've worked with, and doesn't happen at the same point in the sequence. Any ideas? I'm not sure what other info might be useful, so please request more if you have any ideas. Thank you for your time.
Ben Slocum
KCOY-TV/KKFX-TV

Hi all -- I've experienced this problem on a number of projects, one tonight prompted me to check the forum. I used one of the work-arounds and want to report on it, in case it works for someone else or someone with the FCP development team is reading.
My timeline would drop the audio at a repeatable point each time. If I nested the sequence in another sequence, the audio would play but would have a nasty discontinuity right at the frame where the audio drops out in the original sequence.
I used the transparent video slug work-around and it worked (create a slug, set its transparency to zero and place it over the spot where the audio drops out). This occured twice in my timeline. Both times I had used a certain video clip. I had to stretch the slug to exactly match the duration of the offending video clip in order to keep the audio from dropping out.
This sounds like a bug that should be repeatable and fixed. If anyone with FCP development team wants my project, I would be glad to send it to them on a DVD for investigation. I'm running FCP 5.0.3 on a G5 dual 2.7GHz with an internal SATA drive, so it probably isn't a machine speed issue. (I tried the re-render trick and that didn't work and if I remove the slug or change its duration to anything less than the duration of the offending video clip, the audio drops out again.)
G5 dual 2.7GHz   Mac OS X (10.4.4)   4GB RAM

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