I can normally solve these things in a trice, but this ones got me stuck. On my own computer, using my Netgear DG834G v3 router thats served me fine for ages, all of a sudden my torrent client (uTorrent) is flagging me as unconnectable. Ive checked all the usual things... Changed port in uTorrent, checked that the port is forwarded correctly in the router, checked IP of this machine, no firewall issues (windows firewall is turned off) and after a reboot, the icon still says unconnectable. Im doing some traffic - 60k/s down, 25k/s up, so im not being blocked by my ISP or anything silly like that, but im flummoxed... any ideas?

Update: changed port (again) and enabled encryption, sorted it out nicely. Ive got a feeling that my ISP is up to some traffic management malarky...

I have had encryption on from start was going to suggest
to ad stuff in advanced settings.

net.outgoing_ip (your routers IP)

and net.outgoing_port  

had to add those since µTorrent 1.7.5 (using 1.7.7 now).