Not an OS X complaint but Mac-related... I just told iTunes to make me a Genius list based on "It's All I Can Do" by the Cars and it obliged gladly and began playing. Then when I went back to the list to save it, Genius was saying "Genius makes playlists from songs in your library that go great together" and there was no list of songs. The Genius list I had just made was still happily playing along, but where from I have no idea. Even when I select "Show Current Song" it takes me back to the Genius advertising page. So very very weird.
So I find "It's All I Can Do" again and iTunes cheerfully informs me there is no Genius information for "It's All I Can Do" by the Cars; would I like to update my Genius information?
Well, sixty-eight thousand tracks, that's gonna take a while. I'll let y'all know what happens.