Well, I've figured it out.
it's a CV bleedthrough problem - plugging the output of the vca into an oscillator, with no audio input into the VCA, with an env into the VCA causes the pitch on the osc to follow the envelope.
Now, the question is: is my module broken, or is this a design problem? I've been told that I'm the only one who has ever complained about this... but at the same time Paul looked @ my VCA & said that it's within spec...
Was Paul wrong (and my unit is broken), is is everyone else deaf? (and they are ALL like that) ;)
/p