I was having the problem many were complaining about where the icq user always appearing offline and thus I could not reply to im's from that person. After some more poking around on apple discussions I found out that this might have something to do with the buddy being blocked. I looked at the buddies in my ichat using the icq number to log in and it turns out that the entire buddy list was blocked, (buddy meny --> block user was checked). I don't know why. After unblocking the entire buddy list, which I had to do one by one, I didn't have the problem and the icq user showed up as available and online in my ichat using an aim screen name.