I'd recommend reinstalling Java using the "Offline" standalone java installer. The following thread has a link to this Jaguar java installer:
http://www.gnutellaforums.com/showth...threadid=49809
If that doesn't work, delete the LW preferences file called limewire & found here: /Users/your_username/Library/Preferences/LimeWire
Or you could delete the prefs file 1st to see if that fixes it without the need for the reinstallation of Java.