I installed the latest BB software, 18.104.22.168. No change in the resume behavior.
Had another look at setting the audio level and was unsuccessful. There doesn't seem to be any setting in the hardware devices.
Looking at every volume control for every device didn't do it either. Nothing adjusts the radio volume except the main volume control.
I'm using eLite Wings as a skin and last night, if the hdradio was enabled, RR would quit as soon as I heard the click from the BB. I didn't try it with CarWings, got too late.
Anyone have experience with this thing in XP?