I have been having huge headaches since installing leopard, most notably when getting out of sleep (unresponsive keyboard, jerky cursor, blank screen etc). This mornings patch seems to have fixed the keyboard issue but the other bugs still dog my MBP. I think I may have found the culprit however. In my case I stopped using dashboard and it has been flawless since! I think it may be related to the new web clippings function but I need to investigate further. Let me know if this fixes it for you!!