I've searched for what seems like hours through the web trying to fix this, but nothing seems to work. I have an 800Mhz G3 iBook with Airport running 10.3.6 and connecting through a D-Link DI-514 wireless router. No matter what I do (turning off Mac OS X Firewall, opening firewall ports in router, setting up virtual server in router), I can't get any P2P apps to work. Acquisition simply won't connect to anything. BitTorrent will connect to hosts, but not download anything. This probably deals more with the router than the Mac, but I thought I'd give you guys a try. Have any ideas?