Anyone having Quicktime Problems

I've loved QT since I first had control of my first PC. But I've been having a Problem with QT6 for OSX. It occurrs when I attempt to play a .wav or a .mpg backwards (those are the only formats that will actually reverse the speach). After only a coulple of frames (Nano Seconds) the sound cuts out. Sometimes its just a skip, others it cuts out completly, and the only to continue is to forward the video(song) and try again. I have reported the problem to Apple, and there have been some improvments with 6.2, but its nothing like QT4 or QT5.

Any ideas.

TEG