I just want to report that I've not had any problems using either my Holux M1000 BTGPS device or my Sony HBH-DS970 stereo headphones with the new 1.6 ROM.
I successfully paired both devices and can get GPS navigation through the BT stereo headphones. Also, when listening to mp3's when a call comes in the audio gateway automatically closes and the phone picks up, and when a call ends, the music comes back [though it does not pause the music as it continues to run in the background].
I also figured out what was causing the battery drain issue I posted about previously - I was running xcpuscalar at 624 the entire time and it drained my 2400mah extended battery in about 3 hours!
Also, I've noticed one shell problem - when i put the ppc in landscape mode, the colors are uniform for about 7/8 of the way from left to right with the last 1/8 on the right in a different hue [slightly lighter in shade]. I'll try to take a screencap of this. Anyone else with this problem?
hmm, can't seem to get the imageshack screencap to show up ...