Ultima- Let me jump in on that too. To answer your questions, yes and N/A (no software firewall). uPnP is disabled. I had success setting bt.transp_disposition to 13 or 15 a couple of times. Once, I closed µT for gaming, and when I finished and reloaded it, upstream and downstream transfer speeds were fluctuating wildly, and well below what should be considered normal (or acceptable). Upon setting bt.transp_disposition to 5, everything returned to "normal". I'm having difficultly reliably recreating success or failure at bt.transp_disposition=13/15 simply because, I have no idea what I did differently, if anything. On another occurrence, I noticed that upload speeds were tanking at regular intervals, then return to the full limit. The speed graph looked like a sawtooth pattern. I have been unable to recreate that event, either. Basically, I'm not sure what's going on. Regards