If you cancell a very large number of files after running LW for wa while this is a possibilty.. to look better at the problem I think some more details would help us. birdy has a good list of things that will help here
http://www.gnutellaforums.com/showthread.php?t=62652 It is a list to cover all evenualities so you may think some details are not needed, but every little helps
