It's not only for martes. I have the same problem and it is because of IP pool Polish Telecom recently bought (ip starting with 83). Since it was not used for a long time, to prevent hackers from using it many administrators have blocked it entirely on their routers/servers. And now it seems, that some of them have not updated their settings.
Problems with WWW are easily solved with a proxy, but I don't think you can use proxy with bittorrent [img]i/expressions/face-icon-small-sad.gif[/img] At least not the versions I have seen.

Maybe GotWoot admins could do something about it?