When I logged in to my wordpress admin page it showed me please upgrade to wordpress 3.5 , when I clicked upgrade it had been upgraded but i found the following php error
Warning: Missing argument 2 for wpdb::prepare(), called in E:\wamp\www\wordpress\wp-3.3-RC3\wp-content\plugins\wp-symposium\wp-symposium.php on line 1120 and defined in E:\wamp\www\wordpress\wp-3.3-RC3\wp-includes\wp-db.php on line 990
please help me . I don't know how to solve this problem .