Index: /branches/2.2/wp-admin/admin-functions.php
===================================================================
--- /branches/2.2/wp-admin/admin-functions.php	(revision 5838)
+++ /branches/2.2/wp-admin/admin-functions.php	(working copy)
@@ -901,7 +901,7 @@
 function _wp_get_comment_list( $s = false, $start, $num ) {
 	global $wpdb;
 
-	$start = (int) $start;
+	$start = abs( (int) $start );
 	$num = (int) $num;
 
 	if ( $s ) {
Index:  /branches/2.2/wp-admin/edit-comments.php
===================================================================
--- /branches/2.2/wp-admin/edit-comments.php	(revision 5838)
+++ /branches/2.2/wp-admin/edit-comments.php	(working copy)
@@ -76,7 +76,7 @@
 endif;
 
 if ( isset( $_GET['apage'] ) )
-	$page = (int) $_GET['apage'];
+	$page = abs( (int) $_GET['apage'] );
 else
 	$page = 1;