Hey there!
I don't know if someone else mentioned this yet. But if you do a complex timestretch within a sample, there's a kind of crackling noisy effect...
I put an example on my server: http://www.djneo.de/complex.zip
The error does only appear if you have an hard crossing of no timestretch and very high time stretch within the sample......
maybe this is useful for a bug correction
peace
neo