Note: This issue is resolved in Soundtrack Pro 1.0.3. This update is recommended for all Soundtrack Pro customers. Use Software Update or download updates here.
After recording a take in Soundtrack Pro, the application may quit unexpectedly when you try to save the clip as a looping clip. This can occur if your audio is longer than 30 seconds, and you Control-click the recording, choose Save Clip As from the pop-up menu, then select the Looping button in the Save Clip As dialog.
To avoid this issue, do not save clips that are longer than 30 seconds as looping clips. The same issue may occur if you try to change one or more one-shot clips, longer than 30 seconds, to looping clips using the Apple Loops Utility.