How did you do the update? Through Apple's updater? If so try going directly to their site and downloading it.
I have problems when I use their updater, so I always have to do it "manually".
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I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States. - Oath of office of the President of the United States
"We spent 30 years digging ourselves into this hole. It won't be solved soon." - U.S. Energy Secretary Samuel Bodman
