Access Denied on Drupal 6.17 with Firefox
Drupal 6.17 changes the way session cookies are handled.
The release notes seem to make light of the change, it seems that if you are using Firefox you have to set a $cookie_domain in your settings.php file.
I changed my $cookie_domain (which was previously commented out) to the following – and all worked perfectly:
$cookie_domain = $_SERVER[‘HTTP_HOST’];