Per,
I have exactly the same problem with my Rev 1 QMX build running firmware 014. I had good results running barefoot on Ft8 and thought I would try hooking up my QRP Labs 50W amp. Much to my surprise, I have a constant 5V on the ring of the PTT in receive or transmit. I too hope the next firmware release will fix this.
73,
Pete, KH6GK
