I am using Red Hat 7.1.. I have recieved font error messages in every limewire I have used (1.4, 1.6, and now 1.6b) but that has never prevented the application from running, and the fonts have never appeared odd to me. Every font LimeWire tried to call recieved an error. So I don't know exactly what font it is using, but it's working and it looks fine.