sound issue in single race mode

[Tschaka]

joe: there is a sound associated with the popup. but as i said, this also occurs when i have music running, only not that bad.
i actually wouldnt care, if the jitter would only occur as long as the popup is opened or its sound played, but it then stays all the time.

maybe some more info about my machine:

ubuntu 8.10 32 bit, all updates
ALSA (got pulseaudio uninstalled)
vdrift build with scons
soundcard is an audigy 2

if you do need more, just ask.

edit: basically, this problem seems to occur generally when some other windows gets focused. when i'm running in window mode, and switching to an IM window, this occurs. it doesn't seem to occur when the IM sound comes up though. so it's rather a window switching issue i guess.