I am using a new powerbook 17" with Tiger. I am also using a program which is set to port 6881. I have never seen a green icon. It always remains yellow and the speed is not the best. A friend of mine did something to my old 17" and the problem was solved. Downloads were rocket fast. I'm not to sure what he did though and I can't get in touch with him.. Oh and I'm using an airport base station.
I hope you can help.