I'm not sure whether this is going to fix it for you, but see post # 26 (by abj) in this thread
http://www.gnutellaforums.com/showth...&highlight=tab
Otherwise, you could try updating Java...see point 1 below. Use the JRE offline installer & remove your current Java version before installing the new one.
Fixes for LimeWire
Also delete LW's preferences folder when LW's properly closed. That's points 2 & 3 above.