You do not have sufficient permissions to access this page.

After a fresh one-click install (4.1) I get

Database Update Required
WordPress has been updated! Before we send you on your way, we have to update your database to the newest version.
The update process may take a little while, so please be patient.

After pressing the continue button it reloads the page and displays the following message:

Update Complete
Your WordPress database has been successfully updated!

After pressing continue, I get the following error message:
You do not have sufficient permissions to access this page.

Any help would be appreciated. ANd why are so many people having this problem????