Stereo Tool

Problem description
Waves and bar levels seen on the GUI doesn't match with the sound, sound is delayed respect to GUI. I've been seeing this for a long time. Previously I had v6.01 (or something like that) and I've just updated to v6.20 and the problem persists. Just after I installed the latest version it was working fine (synchronized) but after some time it is out of sync again.

Sound is fine and all controls work fine, the only failure I've seen is the loss of sync.

System Details
* Stereo Tool 6.20, Winamp plugin
* Winamp 5.62
* Windows 7, x64

Are you listening to mp4, m4a, or flac files? Those are fed from Winamp in different size chunks compared to wav and mp3.