Everything I've read says no tether app yet for 1.6 only 2.x. What bluetooth app do you have installed, I still don't have BT working, but I was able to do BT file transfers under my original 1.7.4 ROM. Slatedroid, ECOTOX and Caffeine roms haven't worked for BT yet. So I'm thinking one of the apps you have installed loaded RFCOMM for bluetooth stack.