Index: wp-admin/upload.php
===================================================================
--- wp-admin/upload.php	(revision 6928)
+++ wp-admin/upload.php	(working copy)
@@ -139,7 +139,7 @@
 
 <div style="float: left">
 <input type="submit" value="<?php _e('Delete'); ?>" name="deleteit" class="button" />
-<?php wp_nonce_field('bulk-posts'); ?>
+<?php wp_nonce_field('bulk-media'); ?>
 <?php
 
 $arc_query = "SELECT DISTINCT YEAR(post_date) AS yyear, MONTH(post_date) AS mmonth FROM $wpdb->posts WHERE post_type = 'post' ORDER BY post_date DESC";