I exported the audio tracks, as usual, to Audition as AIFF file (and tried Soundtrack Pro but same results) then reimported the file as AIFF back to FCP 7.0.3 (OS 10.6.8).
In the viewer the duration of the file is correct(220.127.116.11), matches the timeline duration. BUT.... when inserted in the now two tracks of audio (down from 7)... its about 6 seconds short (18.104.22.168)
Timeline is a 1920 1080i 16:9, square, no field dominance, timebase 25, xdcam ex 1080p 25 compressor. audio 48k, 16bit, config channel grouped.
I've tried wav files and aiff from Audition and Stp. I've done this many times on shorter projects and no brainer easy sweet.