Number of pages calculated incorrectly if permissions hide content

If there is content that is hidden due to inadequate user permissions, the number of pages required to display all the teasers for a given category or on the home page is calculated incorrectly. It is not merely increased to allow space for the hidden articles, but seems to add a bogus page for every hidden article.

The bogus pages cannot display any content and thus display the 'Welcome to your new Drupal site' message when you navigate to them.

This happens quite often when you have taxonomy based permissions enabled.

e.g.
There are three hidden articles that you don't have permission to read. On the main home page there is a navigation area for pages 1 2 3 4. The first page is as expected, the other three pages display 'Welcome to your new Drupal site...'

A user that has permission to read the articles sees only one page.