I get the same problem and I have tried to downgrade java but that so far has not fixed anything. I believe it has to do with the OS itself.
i'm running the latest version of Mountain Lion 10.8.2
IGN: Mitzey234
Reason for wanting to become a member: to be able to access your plugins so i can have better game play experience.
Why should we accept you: cause this server seems cool by the looks of it. I enjoy this server :D