Nope, not using a mac.. soon though! I'm pretty sick of Microsoft, so when Leopard's released I'm going to switch over. Yeah, I know the way they do that, pretty annoying, but I'm usually searching for files that don't attract such attention over copyright issues, so I guess I was just shocked by the scale of the problem. Do the 0 byte files in the incomplete folder add to the high number of sources for these downloads? If so (or even just for keeping the folder clean) Limewire should delete any 0 byte files on cancellation. There not doing any good for anyone there..
One thing I've noticed is that these files are usually hosted on systems with "browse host" disabled, or when browsed the error "couldn't browse host" pops up, so armed with this information for random spot checks, I'm going to go on the biggest careless blocking spree ever!

Expect to next see me under a thread named "No search results.. WHY?! " haha

lol Yes I agree, the incompletes should be removed automatically if you deliberately cancel downloads. But at least it does give the option of recontinuing the downld if you made a mistake or changed your mind. The incompletes don't have any relationship with the sources of your search results. But having many incompletes will make LW take longer to startup, longer to settle down, & use up more computer resources such as ram & virtual memory.