Lately, I've been having some serious problems with iChat on Leopard. Sometimes it works fine, other times my friends can't IM me, and other times I can't IM people. For example, I just IMed my friend and this is what he got: Previous message was not received by ****** because of error (9:01:26 PM): Your buddy is using a client that does not support the Instant Messaging function. And there are times that my friends also get that error when attempting to IM me. It never is both broke (sending and receiving), only I can only send or I can only receive. Very frustrating The majority of my friends are using AIM on a Windows computer. Any suggestions?