I have the same problem with audio when RAM previewing. I had audio playing before in the same project, but then it somehow stopped working.
The mov has audio waveform in AE timeline, and I can hear it when holding command and then dragging the playhead. And also when double clicked in the project window i can hear the sound. But no sound with 0-preview.
“Audio” is checked in the composition > preview menu, and I can’t find more mute buttons than in the timeline and the one in the transport controls. Maybe there still is one more? it’s cs3.
Please, anyone yet solved this?