Why does LimeWire say I have a firewall?
 

I'm trying to use LimeWire 4.10.5 with OS X 10.3.9. It tells me I have a firewall running. I don't. I found a solution on the FAQ. It didn't work. This also happened with LimeWire 4.9, but never with any previous versions. What is going on? Thank you.

LW 4.9 introduced an auto firewall detector. If you don't have your OSX firewall turned on, then the issue is most likely your modem/router. Personally I needed to manually port forward mine. But the newer ones have UPnP but some need to be enabled. See Connection problems? Check here first!