Rippled Sound --> QuickTime in Linux?

Hello SuSE folks, As most of you have suggested I've purchased CrossOver Office Plugin for Linux and installed it. However, every time I open web page in Mozilla browser, it plays QuickTime video stream but the sound is rippled. It sounds like: Squick Squick Squick Squick ... with a very high pitch and frequency. I'm using SuSE 8.1 Pro with plain 2.4.19 kernel and ALSA modules compiled separately. My desktop env. is KDE 3.1 If I'm using Mozilla and Noatun to watch mpg movies it works OK. So, I conclude that the sound server works. Could somebody please give me a hint what should be checked/changed to make sound work properly with Mozilla and QuickTime plugins. Many thanks in advance Alex