BUMP - Anyone have input on the sensitivity issue, perhaps on another Roland with the Ivory Feel-G Keybed? I've noticed that all the black keys are slightly less sensitive, and that the one C is slightly more sensitive than the average white key.

I solved the other issue. The headphone jack signal was too hot going to the amplified speakers. Turning the volume down to about 1/4 to 1/3 fixed it temporarily, and now I have a pair of 1/4" unbalanced to RCA cables so I'm no longer using the headphone jack to drive the speakers.

Thanks!