Index: skins/MonoBook.php
===================================================================
--- skins/MonoBook.php	(revision 38981)
+++ skins/MonoBook.php	(working copy)
@@ -104,7 +104,7 @@
 	</head>
 <body<?php if($this->data['body_ondblclick']) { ?> ondblclick="<?php $this->text('body_ondblclick') ?>"<?php } ?>
 <?php if($this->data['body_onload']) { ?> onload="<?php $this->text('body_onload') ?>"<?php } ?>
- class="mediawiki <?php $this->text('nsclass') ?> <?php $this->text('dir') ?> <?php $this->text('pageclass') ?>">
+ class="mediawiki <?php $this->text('nsclass') ?> <?php $this->text('dir') ?> <?php $this->text('pageclass') ?> <?php $this->text('talkclass') ?>">
 	<div id="globalWrapper">
 		<div id="column-content">
 	<div id="content">
Index: skins/Modern.php
===================================================================
--- skins/Modern.php	(revision 38981)
+++ skins/Modern.php	(working copy)
@@ -95,7 +95,7 @@
 	</head>
 <body<?php if($this->data['body_ondblclick']) { ?> ondblclick="<?php $this->text('body_ondblclick') ?>"<?php } ?>
 <?php if($this->data['body_onload'    ]) { ?> onload="<?php     $this->text('body_onload')     ?>"<?php } ?>
- class="mediawiki <?php $this->text('nsclass') ?> <?php $this->text('dir') ?> <?php $this->text('pageclass') ?>">
+ class="mediawiki <?php $this->text('nsclass') ?> <?php $this->text('dir') ?> <?php $this->text('pageclass') ?> <?php $this->text('talkclass') ?>">
 
 	<!-- heading -->
 	<div id="mw_header"><h1 id="firstHeading"><?php $this->data['displaytitle']!=""?$this->html('title'):$this->text('title') ?></h1></div>
Index: includes/SkinTemplate.php
===================================================================
--- includes/SkinTemplate.php	(revision 38981)
+++ includes/SkinTemplate.php	(working copy)
@@ -192,6 +192,7 @@
 		$tpl->set( 'pagetitle', $wgOut->getHTMLTitle() );
 		$tpl->set( 'displaytitle', $wgOut->mPageLinkTitle );
 		$tpl->set( 'pageclass', Sanitizer::escapeClass( 'page-'.$this->mTitle->getPrefixedText() ) );
+		$tpl->set( 'talkclass', ( $wgTitle->isTalkPage() ? "ns-talk" : "ns-subject" ) );
 
 		$nsname = isset( $wgCanonicalNamespaceNames[ $this->mTitle->getNamespace() ] ) ?
 		          $wgCanonicalNamespaceNames[ $this->mTitle->getNamespace() ] :
Index: includes/Skin.php
===================================================================
--- includes/Skin.php	(revision 38981)
+++ includes/Skin.php	(working copy)
@@ -568,8 +568,9 @@
 		$a['onload'] = $wgOut->getOnloadHandler();
 		$a['class'] =
 			'mediawiki ns-'.$wgTitle->getNamespace().
-			' '.($wgContLang->isRTL() ? "rtl" : "ltr").
-			' '.Sanitizer::escapeClass( 'page-'.$wgTitle->getPrefixedText() );
+			' '.( $wgContLang->isRTL() ? "rtl" : "ltr" ).
+			' '.Sanitizer::escapeClass( 'page-'.$wgTitle->getPrefixedText() ).
+			' '.( $wgTitle->isTalkPage() ? "ns-talk" : "ns-subject" );
 		return $a;
 	}