Checking the forum, I see that "large files are not a problem", so don't know what my "issue" is. I am about zero for four making it all the way through a clean up of my 81k songs. When "Reuniting Orphans" I get a "iTunes is being unresponsive" message. I have tried closing iTunes, but then SS starts over. I have never seen my Mac lock up nor run so terribly slow! Any suggestions for getting cleaned up. I'd love to try MPFreaker, but don't believe in SS yet . . .