Sounds weird. I think I read about something similar a while back. A firewall shouldn't cause a display problem if Limewire is finding results, and if LW is finding results, it's able to connect and search fine through your firewall. You are just having trouble displaying the results, right?

A fresh install should replace all the old components, but if not, how do you ensure you're completely uninstalling Limewire? Getting rid of some old corrupt components might help the fresh install. Older versions did have some invisible prefs (Find in "everywhere" ; file name contains "limew"; visibility "all". I don't know if it's necessary, but I also trash the invisible file found by searching for "zerog" (.com.zerog.registry.xml).

Then, if it's not a LW install problem, a system display problem would be the next check. Have you tried creating a new Admin User Account? That will give you all new preferences and is much easier than reinstalling the system. I could find the Apple details if it will help, so do post back.

If you don't want to try any of these, I noticed Pro support is answering some emails, or try Acquisition.