is this just happening to me? and: what is it?

when i launch a search (no matter for what type of file), almost always i'll pretty soon receive, among the results, one which matches the wording of my search term exactly, has more or less the right extension (for example for video it comes in as .mpg, but never as .avi) and is 28KB big.

usually that's too small to qualify for what i'm looking for.

any ideas who's sending this thing? is it some kind of decoy (so that if i download it the other end somehow identifies me)? is it just a system bug?

i'm using limewire 2.2.4 on a mac (os 9.1).

i'd love to know...

ciao, phil.