I read all that. Sounds like it may be a WindowsXP issue. I have read through the threads here, and am almost positive that they limit u/l as most ASDLs do.
Just out of curiousity have you ever tried rolloing back to sp1, to see if you have the same difficulties. Have you also tried contacting MS support about this issue (I would enclose the correspondence you have posted here).
I would also forward any correspondence from MS to insight.
Unfortunately I'm not of much assistance in this matter, as I have DSL connection with no restrictions on p2p applications.
You should read this link and links within to get a better idea of what's going on with insight BB:
http://www.gnutellaforums.com/showth...hlight=insight