Jabber - stealth mode

It seems that when I log on to my jabber account, I am not visible to other users (using other servers). They can chat with me, do anything…just not see me as avaialble. I thought it was my client (kopete) but when I switched (psi) the same was true. I wonder if anyone is experiencing the same thing? (maybe you are but don’t know it and are wondering why nobody starts a chat with you :slight_smile: