That is my suspicion, though I can't think of any good reason why this might have happened.
Kost7 - Can you tell me if there was anything out of the ordinary when you recorded this file? Did Audition crash or were there any warning messages that popped up? Were you ever able to hear any signal?
When Audition records in multitrack, it writes directly to a file on disk. (In Waveform view, it records to a temp file as an intermediary step - not the case here.) After the recording process has stopped, it scans the recorded file and generates a ".pkf" file which contains a lower-resolution representation of the waveform.
This implies that there WAS audio data in the WAV file at the time that pkf file was generated. The only way I've been able to sort of simulate this behavior is by deleting the WAV file, but not the .pkf file, then opening the session up and recording a new clip on the same track. In this scenario, the existing .pkf file does not appear to be regenerated to reflect the new recording. I'll enter this as a bug, but I doubt you'd forget to mention this if it were your situation.
Is the session file displayed, 20120325.sesx, the one in which you recorded this session? I notice it's only 30 seconds in duration, so I'm unclear if they're related. Could there be a different session file on disk? Have you tried previewing all of the wav files in the _Recorded subfolder where your session file is located?
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