after upgrading WordPress to 3.5.0 and then 3.5.0 I cannot use this plugin anymore. When I try to activate it the following message from WP is showing up:
Plugin could not be activated because it triggered a fatal error.
Fatal error: Class 'OGraphr_Admin_Core' not found in /path/to/wordpress/wp-content/plugins/meta-ographr/meta-ographr_admin.php on line 20
Before the named version the plugin was usable.