I am using CiviCRM with Drupal 7 (latest version). After upgrading to CiviCRM 4.7, the Track Click Through links in my mailings have stopped redirecting. They just go to the custom CiviCRM URL's, but don't redirect, leaving simply a white page. Everything worked fine before the upgrade.
As instructed in this post, I have added this code to the .htaccess file in the appropriate block area:
php_value date.timezone "America/New_York"
I also tried using the ini_set command for civicm.setting.php mentioned in the same post.