Sanity check. Please confirm my upgrade procedure.

Hi

I'm upgrading from 4.6.6 to 4.7.2

I've had some trouble.

Note: the current site that's running on 4.6.6 has hundreds of users and works well. There are no issues with the 4.6.6 site.

Here are the steps I've followed to upgrade to 4.7.2:

(essentially I've followed the procedure in the handbook)

-made backup of site
-disabled non-core modules
-reset theme to bluemarine
-removed old files from current install (this means I've *deleted them*. I now have an empty directory)
-copied 4.7.2 files to site directory
-copied .htaccess, settings.php & files dir from backup to current dir
-run update.php

The update script detects my current version and chugs away for awhile.

No errors reported by update script.

Drupal runs fine.

I can log in. Data is all intact. All users can log in and out. Site appears to function normally.

But...

If I log out, that is, I become an anonymous user, the main page displays the "Welcome to your Drupla installation" message, as if I was setting the site up for the first time.

Obviously this is a *major* problem as *any* visitor to the site will see this message and appropriate links.

What's gone wrong?

Thanks in advance.

R