login & ckfinder issues: setting the $cookie_domain variable
I have experienced ckfinder permission issues that are resolved by uncommenting and setting the $cookie_domain variable in the settings.php file to the domain name. If this is not configured right can lead into login issues (“Access denied…”). What works for me is to set up the variable as follows:
$cookie_domain = ‘.mydomain.com’;
It is important to note that the dot after the comma can´t be forgotten.
This issue was explained and resolved here: http://drupal.org/node/884458#comment-3445520