Well ... perhaps do the trio:

Uninstall all versions of java using your add/remove control panel.

Reinstall Java using the "Offline" installer here Java 1.5 (take the JRE)

Delete your LW preferences found either in step 2 or 3 here whilst LW is closed of course Fixes for Limewire

Reinstall LW using the "Offline" version http://www.limewire.com/english/content/download.shtml

It might even be an idea to keep spycatcher inactive during this process just in case.