Have you find the resolution? I have exactly same issue. I work with CS6. it was fine until day before yesterday when I opened my project I work on for a while and audio from one movie is missing - exactly those parts I used for cuts. I tried many different options, even starrting completely new project - doesn't work. the audio is present in original.
Me too. Running 6.0.2, although slightly different than in the above posters case. Restarting PP usually encourges the audio to come back for a few minutes before disappearing again. It's doing my head. I think my problem is related to a wider issues as I'm also getting endless reconforms and tonnes of unusual little bugs when working on network material. I did intend to shift our facility to PP from FCP7 but the way this trial is going and the hours and hours we've sunk into chasing down the bugs it's not looking promising..
when working on network material
Pr has had problems with network editing, network user accounts and the like since forever. Try moving one or more projects completely to a local drive. You should see the number of problems shrink significantly.