This is an interesting problem.
AIM 18.104.22.168 as installed on my desktop has this interesting bug: occasionally it won't let me IM, invite to chat or otherwise contact this one person. I can go into chats and talk there. I can chat with other people, but not one individual.
Odd and irritating, you may think?
The person in question is agoodshinkickin.
WHAT THE HELL, AIM?