Have experienced same as "Tycoon" in Jan 2003. Expander does give me a sit file--a StuffIt archive that contains another Limewire document. Double clicking it or dropping it on Expander produces another identical sit file--a StuffIt archive. Same thing happens if I open the applications and try to open the Limewire doc. Does it mean the download was buggy or corrupt? I've spent countless hours downloading files that do this--had to trash 'em all and retry. Retry sometimes works, sometimes not. I hate that!