What Birdy is saying is that you should follow each of her links and read the threads. Very basically you may need to defragment your drive, or reduce your downoad queue by removing unnecessary incomplete files, also remove any files you have previewed before completion. In truth we have not found a definitive answer to this problem, and so any feedback we get is helpful!!!
This post, in one of the above links could also hold the answer, if it might apply to you.
http://www.gnutellaforums.com/showpo...44&postcount=2