I never installed a beta or anything, I just upgraded to Leopard using my own purchased copy today. I seem to get the beachball at random intervals and it freezes my system. It doesn't happen as often as it did when I first upgraded, but it still happens every minute or two. I opened the terminal, typed "top" to look at the top processes. I see that my system does the beachball thing with something called "update_dyl" appears (at the very top) and is then about to disappear. A google search didn't bring up anything at all. Is anyone experiencing the same problem?