Pops and Snaps in FLV playback
 

Strange problem from something that has always worked. When I convert a .mov to a .flv I get a bunch of popping sounds like a record:
http://www.legacyhdv.com/vid16.htm

The .mov is clean, and the audio is a .wav. I've tried re-encoding it three times (Flash Encoder) and even tried upping the quality. Thoughts?