A new version LW 4.0.10 has been released today which has some bug fixes from 4.0.9 which was released a few weeks ago. Might I suggest you do a restart & re-build your desktop. ie: Restart whilst holding down the SHIFT key & keep it held down until you see message on screen asking whether to rebuild desktop folder. Click yes or OK. Then try re-downloading after a restart. The site will most likely still say version 4.0.8 but actually it's the above version! Also see this thread re: upgrading Java, etc.:
http://www.gnutellaforums.com/showth...threadid=33991