SD card unmounted when HTC Desire is being charged (even with a "wall charger")
Strange. I have an HT Desire running 2.2 and don't have that problem. It might be the cable of the charger that is incorrectly registering as being a USB connection (faulty, cheap knockoff that is incorrectly wired?) Try another charger. Blackberrys also use micro USB so ask a buddy to use their charger