Index: trunk/wp-admin/includes/post.php
===================================================================
--- trunk/wp-admin/includes/post.php	(revision 10748)
+++ trunk/wp-admin/includes/post.php	(working copy)
@@ -815,8 +815,10 @@
 		$orderby = 'date';
 	}
 
-	wp("post_type=post&what_to_show=posts$post_status_q&posts_per_page=15&order=$order&orderby=$orderby");
+	$posts_per_page = apply_filters('edit_posts_per_page', 15);
 
+	wp("post_type=post&what_to_show=posts$post_status_q&posts_per_page=$posts_per_page&order=$order&orderby=$orderby");
+
 	return array($post_stati, $avail_post_stati);
 }