Try uninstalling LW & reinstalling - see LOTR's post here:
http://www.gnutellaforums.com/window...tml#post320995
Even though you've done the Java update, try doing the whole lot again as in that post & see whether it fixes the problem!
Sometimes there are problems with deleting the preferences folder...you'll know if you've done it properly - you'll have to go through LW's setup wizard all over again