I'm using Snow Leopard, the last version of Transmission and a Linksys Router (WRT54G2).
Everything is working, ports are opened and files download/upload fine. The problem is that if I launch Transmission it hogs the connection to the point where it's unusable. The strange thing is that if I connect the computer to the modem, without the router, it works ok using the exact same configuration. The router only has one machine connected. Do know what could be happening? Thanks!
EDIT: now that I tested it again I realize that when Transmission is opened I can use Adium or browse the internet fine, but my FTP client (Transmit) can't connect or download files anymore.