They're invisible.
They're offline but you have messages turned off.
Your API is fkd (reinstall time).
They're in privacy mode.
You're in privacy mode.
and so on and so forth...
i dun know ..
many peoples like this last nite ..
the ICQ show you're connected ... there suppose have someone online but didn't ...
and you still can chat with someone you KNOWN is online at the moment
If yer able to actively chat with someone (back and forth) and they're shown as 'away' or 'offline' in ICQ, most likely the person you're talking to is in invisible mode.