diff --git a/wp-admin/users.php b/wp-admin/users.php
index c0db416392..83ed449eef 100644
--- a/wp-admin/users.php
+++ b/wp-admin/users.php
@@ -370,7 +370,7 @@ foreach ( $wp_user_search->get_results() as $userid ) {
 	$role = array_shift($roles);
 
 	$style = ( ' class="alternate"' == $style ) ? '' : ' class="alternate"';
-	echo "\n\t", user_row($user_object, $style, $role, isset( $post_counts[ $userid ] ) ? $post_counts[ $userid ] : 0 );
+	echo "\n\t", user_row( $user_object, $style, $role, $post_counts[ $userid ] );
 }
 ?>
 </tbody>
diff --git a/wp-includes/user.php b/wp-includes/user.php
index 7c5ab5c02f..a55f5f09d5 100644
--- a/wp-includes/user.php
+++ b/wp-includes/user.php
@@ -169,17 +169,13 @@ function count_many_users_posts($users) {
 	global $wpdb;
 
 	$count = array();
-	if ( ! count( $users ) )
+	if ( ! is_array($users) || empty( $users ) )
 		return $count;
 
 	$userlist = implode( ',', $users );
 	$where = get_posts_by_author_sql( 'post' );
 
 	$result = $wpdb->get_results( "SELECT post_author, COUNT(*) FROM $wpdb->posts $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_N );
-
-	if ( ! $result )
-		return $count;
-
 	foreach ( $result as $row ) {
 		$count[ $row[0] ] = $row[1];
 	}