When LW is open, click Tools->Options & go to Bug report & click for an example (Click here to see how to do image.) In the window that appears scroll down (about half way down report) to the part that says: "Recieved incoming this session". If it says ‘True’ then LW has no problem with firewalls, but if 'False' it does have a prob.

Also see these threads for optimising LW: http://www.gnutellaforums.com/showth...5&pagenumber=1

http://www.gnutellaforums.com/showth...threadid=27036

Search & dwnld techniques (some hints)

As far as mp3 files go, try to stay away from T3 connections if possible. There's been many reports of corrupt files from T3 sources.

As far as the blue screen goes, see this link:http://www.gnutellaforums.com/showth...threadid=29269 (- it's not related to LW.)