[Fluxus] fluxa osx problems

[gabor papp]

i'm trying to test fluxa on osx. i tried to run the sound example a
couple of times by pressing f5, and after about 30 seconds it starts to
sound quite weird without any error messages. screencast:
http://www.youtube.com/watch?v=beFa6nkMuL8

do you have any idea why this is happening? is this the
non-deterministic interesting artefact mentioned in the documentation or
some kind of bug?

best,
gabor