Kevin,
I run netprobe fine on my 5.6 machine and there is no reason why it should not run on 6.0B3?
I love netprobe, shows every conversation between every computer, local and remote and which port it was made on, very good for finding out who is downloading via p2p or sending huge emails or if one computer is blaster infected, etc etc etc.
Have you installed netprobe via my howto?
ntop was very confusing for me which is why I went to netprobe.
As we get charged for every bit of data that comes to and goes from us, when we get a huge bill, and my boss freaks I can tell him exactly where the data went to!
If you have any problems with netprobe, drop us a line, I dont mind helpin out!
Cyrus Bharda