I guess this has been discussed already, but as I had to wait for the German update to Illustrator 10.0.3, I missed any corresponding threads.
Problem is: When starting the update, I have to identify as admin, get the license agreement and then an error message: "1008:5,-5000 An error has occurred, permission denied" (actually, the message is in German: "Es ist ein Fehler aufgetreten, Zugriff verweigert").
I did the original install with the same admin account in OS 10.2.
Any thoughts? Thanks!