Index: wp-admin/edit-comments.php
===================================================================
--- wp-admin/edit-comments.php	(revision 40198)
+++ wp-admin/edit-comments.php	(working copy)
@@ -118,8 +118,6 @@
 		$redirect_to = add_query_arg( 'untrashed', $untrashed, $redirect_to );
 	if ( $deleted )
 		$redirect_to = add_query_arg( 'deleted', $deleted, $redirect_to );
-	if ( $trashed || $spammed )
-		$redirect_to = add_query_arg( 'ids', join( ',', $comment_ids ), $redirect_to );
 
 	wp_safe_redirect( $redirect_to );
 	exit;
@@ -304,7 +302,7 @@
 
 <?php $wp_list_table->views(); ?>
 
-<form id="comments-form" method="get">
+<form id="comments-form" method="post">
 
 <?php $wp_list_table->search_box( __( 'Search Comments' ), 'comment' ); ?>