I assume you read the last part of the following thread.
http://www.gnutellaforums.com/showth...threadid=17321
Essentially if people are taking this advice then they are filtering results for firewalled hosts on the remote end. Which means that if I did a search for files contained on your computer -- you would see the hits register but results from your computer would not show up in my search results because I indicated in my configuration that I don't want to see results from hosts that are behind firewalls.
So no results = no downloads. Now if you think that this has something to do with limewire simply roll back to a previous version and test. Please post your results we would be interested in hearing them.