Just a quick update to those that find this now or in the future. I RMAd the unit back to RPM. They've confirmed that it should be fully compatible with the iPhone 3GS. On the de-install none of the wiring was comprised or pinched and the connection was secure.
Fingers crossed it was a bad unit because I have read other posts on the net from people having problems with the 3GS. We'll see what happens.
Fingers crossed it was a bad unit because I have read other posts on the net from people having problems with the 3GS. We'll see what happens.