Index: includes/Article.php
===================================================================
--- includes/Article.php	(revision 19587)
+++ includes/Article.php	(working copy)
@@ -1687,7 +1687,10 @@
 				$dbw =& wfGetDB( DB_MASTER );
 
 				# Prepare a null revision to be added to the history
-				$comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
+				$modified = $current != '' && $protect;
+				if($protect) $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
+					else $comment_type = 'unprotectedarticle';
+				$comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
 				if( $reason )
 					$comment .= ": $reason";
 				if( $protect )
@@ -1737,7 +1740,7 @@
 				}
 
 				if( $protect ) {
-					$log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
+					$log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
 				} else {
 					$log->addEntry( 'unprotect', $this->mTitle, $reason );
 				}
Index: includes/DefaultSettings.php
===================================================================
--- includes/DefaultSettings.php	(revision 19587)
+++ includes/DefaultSettings.php	(working copy)
@@ -2060,6 +2060,7 @@
 	'block/block'       => 'blocklogentry',
 	'block/unblock'     => 'unblocklogentry',
 	'protect/protect'   => 'protectedarticle',
+	'protect/modify'    => 'modifiedarticleprotection',
 	'protect/unprotect' => 'unprotectedarticle',
 	'rights/rights'     => 'rightslogentry',
 	'delete/delete'     => 'deletedarticle',
Index: languages/messages/MessagesEn.php
===================================================================
--- languages/messages/MessagesEn.php	(revision 19587)
+++ languages/messages/MessagesEn.php	(working copy)
@@ -1740,6 +1740,7 @@
 'protectlogpage' => 'Protection log',
 'protectlogtext' => "Below is a list of page locks and unlocks. See the [[Special:Protectedpages|protected pages list]] for the list of currently operational page protections.",
 'protectedarticle' => 'protected "[[$1]]"',
+'modifiedarticleprotection' => 'changed protection level for "[[$1]]"',
 'unprotectedarticle' => 'unprotected "[[$1]]"',
 'protectsub' => '(Protecting "$1")',
 'confirmprotecttext' => 'Do you really want to protect this page?',
Index: languages/messages/MessagesRu.php
===================================================================
--- languages/messages/MessagesRu.php	(revision 19587)
+++ languages/messages/MessagesRu.php	(working copy)
@@ -1369,6 +1369,7 @@
 'protectlogtext' => 'Ниже приведён журнал установок и снятий защиты со статей.',
 'protectedarticle' => 'защищена страница «[[$1]]»',
 'unprotectedarticle' => 'снята защита со страницы «[[$1]]»',
+'modifiedarticleprotection' => 'изменён уровень защиты страницы «[[$1]]»',
 'protectsub' =>'(Установка защиты для «$1»)',
 'confirmprotecttext' => 'Вы действительно хотите установить защиту этой страницы?',
 'confirmprotect' => 'Подтвердите установку защиты страницы',