The multiband compressor is very buggy; it creates distortions and artefacts even when exporting through the “export audio” features. It sounds like when your computer cannot follow audio files, or when you load a plugin… it’s the same noise you get after export, randomly, and without any logic when you compare to the original audio (i mean, it is not because there is peaks or distortion in the ioriginal; it happens randomly, but happens almost everytime, or may be 1 every 2 times… it should never happen).
Also, very buggy because you cannot record a audio track with an automation of the multiband bypass, because it will stop recording (while continuing playing) and will close the channel where the multiband compressor is loaded.
If you intend to compress or master inside cubase, the multiband compressor will only make your life harder… until it is fixed. too bad, because i find it rather easy to work with… but it is not reliable :-/
I use cubase 5 (.3 update) : is this fixed in cubase 6 ?