We have just updated a Drupal 6 website to Drupal 6.22 for a client. However, the client is now no longer able to login to their account when using IE7. After clicking "Log in" the client is correctly being forwarded to their user account page, but is getting a "You are not authorized to access this page" message and remain unauthenticated. The client has now choice but to use IE7 at work, so switching browser is not an option.
We have tried testing this in various browsers in our office (Chrome, Firefox, IE8 - we don't have access to IE7) and can successfully sign-in to the site every time.
We have tried repairing the sessions table (in case that was corrupted) and still no luck. Our cookie domain is being set in settings.php as: $cookie_domain = $_SERVER["HTTP_HOST"];