Forget this for a moment and what issue has you running this disk utility?
I have run Disk Utility three times today and each time it takes over 30 minutes and shows a whole list of about 41 repairs. Most are in the "PreferencePanes/Display. It finishes with "Permissions repair complete." What is going on? (I just tried again and although I didn't let it finish, it said it would take 33 minutes.)
Thanks, Old Granny Lola