My friend was using his friend's account for a couple months and had no problems with anything minecraft related. He recently got his own account and is having trouble joining the server I made in January. The server is on 1.5, and he has updated to 1.5.1. There are no connection issues for anyone else, and they are also on 1.5.1. I've whitelisted him, his username is PYTHORAXX, and the server message he gets when he tries to connect is that he isn't whitelisted. We've tried using his e-mail as the thing that we whitlisted, but that didn't work. We've confirmed that it is his account, and not his computer. He can connect to any other server than mine. The server IP is minecraft.oscary.org, but I don't think that will help.
PLEASE HELP! It's no fun without him!