Index: wp-admin/admin.php
===================================================================
--- wp-admin/admin.php	(revision 18407)
+++ wp-admin/admin.php	(working copy)
@@ -139,6 +139,8 @@
 else if ( isset($pagenow) )
 	$hook_suffix = $pagenow;
 
+do_action("admin_init-$hook_suffix");
+
 set_current_screen();
 
 // Handle plugin admin pages.