I'm in the same boat as you. I read up on it over at the Ubuntu forums and they seem to have a few fixes for it, but none of them have worked for me.
They recommended blacklisting thermal, or modprobe.d/options file editing so the thermal paramaters are turned off. Finially they suggested to remove it thermal from the kernal. problem with all these is taht they using a more recent kernal than BT3 uses and i dont think BT3 has the required files.
I'll keep searching though.
Okay, going by the Ubuntu thread, What needs to be done is to blacklist "thermal" in "modprobe.d/blacklist" (add line "blacklist thermal" to the bottom.) For them that fixed it. They also removed the thermal module from the kernel (see Astronomy's post).
Now none of this is working for me. BT3 doesn't have "thermal.ko" to remove from the kernel, and blacklisting it doesn't do anything. I'm stuck, short of a kernel update I don's know how to fix it. Maybe one of the more senior members can catch something I've missed.