Index: src/wp-includes/comment.php
===================================================================
--- src/wp-includes/comment.php	(revision 39637)
+++ src/wp-includes/comment.php	(working copy)
@@ -2186,8 +2186,6 @@
 
 	$comment_ID = $data['comment_ID'];
 	$comment_post_ID = $data['comment_post_ID'];
-	$keys = array( 'comment_post_ID', 'comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt', 'comment_type', 'comment_parent', 'user_id', 'comment_agent', 'comment_author_IP' );
-	$data = wp_array_slice_assoc( $data, $keys );
 
 	/**
 	 * Filters the comment data immediately before it is updated in the database.
@@ -2202,6 +2200,9 @@
 	 */
 	$data = apply_filters( 'wp_update_comment_data', $data, $comment, $commentarr );
 
+	$keys = array( 'comment_post_ID', 'comment_content', 'comment_author', 'comment_author_email', 'comment_approved', 'comment_karma', 'comment_author_url', 'comment_date', 'comment_date_gmt', 'comment_type', 'comment_parent', 'user_id', 'comment_agent', 'comment_author_IP' );
+	$data = wp_array_slice_assoc( $data, $keys );
+
 	$rval = $wpdb->update( $wpdb->comments, $data, compact( 'comment_ID' ) );
 
 	clean_comment_cache( $comment_ID );