mkalkbrenner: fixed rare fatal error "Call to undefined function apache_request_headers()" if property system:http_header is used in combination with ThemeKey Debug and drush
mkalkbrenner: fixed warnings in themekey_browser_detection.php
ThemeKey Properties 6.x-2.0beta2 requires at least ThemeKey 6.x-2.0beta7.
Module "ThemeKey Properties Debug" has been integrated into ThemeKey itself in order to extend it. So if you installed "ThemeKey Properties Debug" you should uninstall it before you update to ThemeKey 6.x-2.0-beta7!
Additionally you should ensure that you delete these file when you update ThemeKey Properties on your servers: