This worked well for me after reading this forum and still having problems. I uninstalled Kaffe and nothing changed. I then uninstalled jre1.3.1_01-fcs and installed the j2re1.4 beta. Shazam! I ran the LimeWire file and everything works now. Also keep in mind that you'll need to create a new symbolic link in /usr/bin to the new java binary which will be in /usr/java/j2re*/bin/java.

This fix is for people that were getting that LAX error.