Prints counter with <img> tag at the top of admin/user/user page.

There is a well documented bug in admin menu where on the user page this is printed.

0 / 1 <img src="/sites/all/modules/admin_menu/images/icon_users.png" width="16" height="15" alt="Current anonymous / authenticated users" title="Current anonymous / authenticated users" />

However, it has been happening mostly to people who use the menu breadcrumb module. I'm using the node breadcrumb module and it's happening to me. see http://drupal.org/node/279767#comment-2134474

I disabled the node breadcrumb module and the problem went away. When I enabled it again the problem came back.