Index: wp-admin/freedoms.php
===================================================================
--- wp-admin/freedoms.php	(revision 19264)
+++ wp-admin/freedoms.php	(working copy)
@@ -9,6 +9,12 @@
 /** WordPress Administration Bootstrap */
 require_once( './admin.php' );
 
+/** Don't show notices on informational pages */
+remove_all_actions( 'network_admin_notices' );
+remove_all_actions( 'user_admin_notices' );
+remove_all_actions( 'admin_notices' );
+remove_all_actions( 'all_admin_notices' );
+
 $title = __( 'Freedoms' );
 
 list( $display_version ) = explode( '-', $wp_version );
Index: wp-admin/credits.php
===================================================================
--- wp-admin/credits.php	(revision 19264)
+++ wp-admin/credits.php	(working copy)
@@ -9,6 +9,12 @@
 /** WordPress Administration Bootstrap */
 require_once( './admin.php' );
 
+/** Don't show notices on informational pages */
+remove_all_actions( 'network_admin_notices' );
+remove_all_actions( 'user_admin_notices' );
+remove_all_actions( 'admin_notices' );
+remove_all_actions( 'all_admin_notices' );
+
 $title = __( 'Credits' );
 
 add_contextual_help($current_screen,
Index: wp-admin/about.php
===================================================================
--- wp-admin/about.php	(revision 19264)
+++ wp-admin/about.php	(working copy)
@@ -9,6 +9,12 @@
 /** WordPress Administration Bootstrap */
 require_once( './admin.php' );
 
+/** Don't show notices on informational pages */
+remove_all_actions( 'network_admin_notices' );
+remove_all_actions( 'user_admin_notices' );
+remove_all_actions( 'admin_notices' );
+remove_all_actions( 'all_admin_notices' );
+
 $title = __( 'About' );
 
 list( $display_version ) = explode( '-', $wp_version );