I know this problem, too.
LimeWire worked fine under OS X 10.2.1
Yesterday I updated to 10.2.2 and got that JAVA-Error. I asked some guys it they knwo what this missing class means and they say it isn't installed with OSX at all!
(I was recommended to change to the P"P-App "Acquisition" but this App has other problems ...)
Max.Renn