Index: includes/specials/SpecialBlockip.php
===================================================================
--- includes/specials/SpecialBlockip.php	(revision 57369)
+++ includes/specials/SpecialBlockip.php	(working copy)
@@ -454,7 +454,7 @@
 					# If the name was hidden and the blocking user cannot hide
 					# names, then don't allow any block changes...
 					if( $currentBlock->mHideName && !$wgUser->isAllowed('hideuser') ) {
-						return array( 'hookaborted' );
+						return array( 'cant-see-hidden-user' );
 					}
 					$currentBlock->delete();
 					$block->insert();
Index: languages/messages/MessagesEn.php
===================================================================
--- languages/messages/MessagesEn.php	(revision 57369)
+++ languages/messages/MessagesEn.php	(working copy)
@@ -3001,6 +3001,8 @@
 'sorbs_create_account_reason'     => 'Your IP address is listed as an open proxy in the DNSBL used by {{SITENAME}}.
 You cannot create an account',
 'cant-block-while-blocked'        => 'You cannot block other users while you are blocked.',
+'cant-see-hidden-user'						=> 'The user you are trying to block has already been blocked and hidden. Since you do not have the hideuser right,
+you cannot see or edit the user\'s block.',
 
 # Developer tools
 'lockdb'              => 'Lock database',
Index: maintenance/language/messages.inc
===================================================================
--- maintenance/language/messages.inc	(revision 57369)
+++ maintenance/language/messages.inc	(working copy)
@@ -2024,6 +2024,7 @@
 		'sorbsreason',
 		'sorbs_create_account_reason',
 		'cant-block-while-blocked',
+		'cant-see-hidden-user'
 	),
 	'developertools' => array(
 		'lockdb',