The page setup dialog doesn't work on my new(ish) MacBook Pro. At first I thought it was just a problem with Excel, but the same thing occurs in Word, when trying to print pdfs within Acrobat, everywhere. When I bring up the dialog box to change the paper size or format, it lets me click on what I want, and the OK box lights up, but when I click 'OK' nothing happens. I can't make it register the changes. I've tried deleting and then reinstalling the printer, to no avail. What could the problem be? Someone else posted the same problem on another forum and got no replies. Help!