diff -u -r wiki1.7.1/includes/Article.php wiki/includes/Article.php
--- wiki1.7.1/includes/Article.php	2006-07-09 07:45:26.000000000 +0200
+++ wiki/includes/Article.php	2006-07-19 22:59:46.000000000 +0200
@@ -638,6 +638,7 @@
 		$diff = $wgRequest->getVal( 'diff' );
 		$rcid = $wgRequest->getVal( 'rcid' );
 		$rdfrom = $wgRequest->getVal( 'rdfrom' );
+		$diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 
 		$wgOut->setArticleFlag( true );
 		if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
@@ -654,7 +655,7 @@
 			require_once( 'DifferenceEngine.php' );
 			$wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 
-			$de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
+			$de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid, $diffOnly );
 			// DifferenceEngine directly fetched the revision:
 			$this->mRevIdFetched = $de->mNewid;
 			$de->showDiffPage();
Only in wiki/includes: Article.php.orig
diff -u -r wiki1.7.1/includes/DifferenceEngine.php wiki/includes/DifferenceEngine.php
--- wiki1.7.1/includes/DifferenceEngine.php	2006-07-09 07:45:26.000000000 +0200
+++ wiki/includes/DifferenceEngine.php	2006-07-20 01:32:50.921875000 +0200
@@ -35,9 +35,12 @@
 	 * @param $old Integer: old ID we want to show and diff with.
 	 * @param $new String: either 'prev' or 'next'.
 	 * @param $rcid Integer: ??? FIXME (default 0)
+	 * @param $diffOnly Boolean: only show diff, not rendered article
 	 */
-	function DifferenceEngine( $titleObj = null, $old = 0, $new = 0, $rcid = 0 ) {
+	function DifferenceEngine( $titleObj = null, $old = 0, $new = 0, $rcid = 0, $diffOnly = false ) {
 		$this->mTitle = $titleObj;
+		$this->diffOnly = $diffOnly;
+
 		wfDebug("DifferenceEngine old '$old' new '$new' rcid '$rcid'\n");
 
 		if ( 'prev' === $new ) {
@@ -185,6 +188,27 @@
 			$nextlink . $patrol;
 
 		$this->showDiff( $oldHeader, $newHeader );
+		if ( ! $this->diffOnly ) {
+	  		$this->showArticle();
+                    } else {
+			$wgOut->addHTML(
+				"<div class='patrollink'>" .
+					wfMsg ( 'markaspatrolledlink',
+					$sk->makeKnownLinkObj( $this->mTitle, "Show diff with article", "diff=".$this->mNewid."&oldid=".$this->mOldid."&diffonly=0" )
+			 		) .
+				'</div>'
+			 );
+		}
+
+		wfProfileOut( $fname );
+	}
+
+	/**
+	 * Show the rendered article
+	 */
+	function showArticle() {
+		global $wgOut;
+
 		$wgOut->addHTML( "<hr /><h2>{$this->mPagetitle}</h2>\n" );
 
 		if( !$this->mNewRev->isCurrent() ) {
@@ -200,8 +224,6 @@
 		if( !$this->mNewRev->isCurrent() ) {
 			$wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 		}
-
-		wfProfileOut( $fname );
 	}
 
 	/**
diff -u -r wiki1.7.1/languages/Language.php wiki/languages/Language.php
--- wiki1.7.1/languages/Language.php	2006-07-09 07:45:46.000000000 +0200
+++ wiki/languages/Language.php	2006-07-19 23:14:45.125000000 +0200
@@ -84,6 +84,7 @@
 	'externaldiff' 		=> 0,
 	'showjumplinks'		=> 1,
 	'numberheadings'	=> 0,
+	'diffonly'	=> 0,
 	'uselivepreview'	=> 0,
 	'watchlistdays' 	=> 3.0,
 );
@@ -161,6 +162,7 @@
 	'externaleditor',
 	'externaldiff',
 	'showjumplinks',
+	'diffonly',
 	'uselivepreview',
 	'autopatrol',
 	'forceeditsummary',
diff -u -r wiki1.7.1/languages/Messages.php wiki/languages/Messages.php
--- wiki1.7.1/languages/Messages.php	2006-07-09 07:45:46.000000000 +0200
+++ wiki/languages/Messages.php	2006-07-19 23:15:39.234375000 +0200
@@ -62,6 +62,7 @@
 'tog-externaleditor' => 'Use external editor by default',
 'tog-externaldiff' => 'Use external diff by default',
 'tog-showjumplinks' => 'Enable "jump to" accessibility links',
+'tog-diffonly' => 'Show diffs without article body',
 'tog-uselivepreview' => 'Use live preview (JavaScript) (Experimental)',
 'tog-autopatrol' => 'Mark edits I make as patrolled',
 'tog-forceeditsummary' => 'Prompt me when entering a blank edit summary',