Index: includes/api/ApiPageSet.php
===================================================================
--- includes/api/ApiPageSet.php	(revision 87498)
+++ includes/api/ApiPageSet.php	(working copy)
@@ -655,15 +655,26 @@
 	 * @return LinkBatch
 	 */
 	private function processTitlesArray( $titles ) {
+		global $wgContLang;
 		$linkBatch = new LinkBatch();
 
 		foreach ( $titles as $title ) {
-			$titleObj = is_string( $title ) ? Title::newFromText( $title ) : $title;
+			if ( is_string( $title ) ) {
+				// Normalize title for Unicode and create a Title object
+				$normTitle = $wgContLang->normalize( $title );
+				$titleObj = Title::newFromText( $normTitle );
+			} else {
+				$titleObj = $title;
+				$normTitle = $titleObj->getPrefixedText();
+			}
 			if ( !$titleObj ) {
 				// Handle invalid titles gracefully
-				$this->mAllpages[0][$title] = $this->mFakePageId;
-				$this->mInvalidTitles[$this->mFakePageId] = $title;
+				$this->mAllpages[0][$normTitle] = $this->mFakePageId;
+				$this->mInvalidTitles[$this->mFakePageId] = $normTitle;
 				$this->mFakePageId--;
+				if ( is_string( $title ) && $title !== $normTitle ) {
+					$this->mNormalizedTitles[$title] = $normTitle;
+				}
 				continue; // There's nothing else we can do
 			}
 			$unconvertedTitle = $titleObj->getPrefixedText();
@@ -674,7 +685,6 @@
 				$this->mInterwikiTitles[$titleObj->getPrefixedText()] = $iw;
 			} else {
 				// Variants checking
-				global $wgContLang;
 				if ( $this->mConvertTitles &&
 						count( $wgContLang->getVariants() ) > 1  &&
 						!$titleObj->exists() ) {
@@ -713,7 +723,8 @@
 	protected function getAllowedParams() {
 		return array(
 			'titles' => array(
-				ApiBase::PARAM_ISMULTI => true
+				ApiBase::PARAM_ISMULTI => true,
+				ApiBase::PARAM_NORMALIZE_UNICODE => false,
 			),
 			'pageids' => array(
 				ApiBase::PARAM_TYPE => 'integer',
Index: includes/api/ApiBase.php
===================================================================
--- includes/api/ApiBase.php	(revision 87498)
+++ includes/api/ApiBase.php	(working copy)
@@ -53,6 +53,7 @@
 	const PARAM_DEPRECATED = 7; // Boolean, is the parameter deprecated (will show a warning)
 	const PARAM_REQUIRED = 8; // Boolean, is the parameter required?
 	const PARAM_RANGE_ENFORCE = 9; // Boolean, if MIN/MAX are set, enforce (die) these? Only applies if TYPE='integer' Use with extreme caution
+	const PARAM_NORMALIZE_UNICODE = 10; // Boolean, should we normalize Unicode for a parameter? Defaults to true
 
 	const LIMIT_BIG1 = 500; // Fast query, std user limit
 	const LIMIT_BIG2 = 5000; // Fast query, bot/sysop limit
@@ -672,6 +673,7 @@
 			$dupes = false;
 			$deprecated = false;
 			$required = false;
+			$normalizeUnicode = true;
 		} else {
 			$default = isset( $paramSettings[self::PARAM_DFLT] ) ? $paramSettings[self::PARAM_DFLT] : null;
 			$multi = isset( $paramSettings[self::PARAM_ISMULTI] ) ? $paramSettings[self::PARAM_ISMULTI] : false;
@@ -679,6 +681,7 @@
 			$dupes = isset( $paramSettings[self::PARAM_ALLOW_DUPLICATES] ) ? $paramSettings[self::PARAM_ALLOW_DUPLICATES] : false;
 			$deprecated = isset( $paramSettings[self::PARAM_DEPRECATED] ) ? $paramSettings[self::PARAM_DEPRECATED] : false;
 			$required = isset( $paramSettings[self::PARAM_REQUIRED] ) ? $paramSettings[self::PARAM_REQUIRED] : false;
+			$normalizeUnicode = isset( $paramSettings[self::PARAM_NORMALIZE_UNICODE] ) ? $paramSettings[self::PARAM_NORMALIZE_UNICODE] : true;
 
 			// When type is not given, and no choices, the type is the same as $default
 			if ( !isset( $type ) ) {
@@ -698,7 +701,7 @@
 
 			$value = $this->getMain()->getRequest()->getCheck( $encParamName );
 		} else {
-			$value = $this->getMain()->getRequest()->getVal( $encParamName, $default );
+			$value = $this->getMain()->getRequest()->getVal( $encParamName, $default, $normalizeUnicode );
 
 			if ( isset( $value ) && $type == 'namespace' ) {
 				$type = MWNamespace::getValidNamespaces();
Index: includes/WebRequest.php
===================================================================
--- includes/WebRequest.php	(revision 87498)
+++ includes/WebRequest.php	(working copy)
@@ -238,9 +238,10 @@
 	 * @param $arr Array
 	 * @param $name String
 	 * @param $default Mixed
+	 * @param $normalizeUnicode Whether to normalize Unicode in the returned value
 	 * @return mixed
 	 */
-	private function getGPCVal( $arr, $name, $default ) {
+	private function getGPCVal( $arr, $name, $default, $normalizeUnicode = true ) {
 		# PHP is so nice to not touch input data, except sometimes:
 		# http://us2.php.net/variables.external#language.variables.external.dot-in-names
 		# Work around PHP *feature* to avoid *bugs* elsewhere.
@@ -254,7 +255,9 @@
 					$data = $wgContLang->checkTitleEncoding( $data );
 				}
 			}
-			$data = $this->normalizeUnicode( $data );
+			if ( $normalizeUnicode ) {
+				$data = $this->normalizeUnicode( $data );
+			}
 			return $data;
 		} else {
 			taint( $default );
@@ -270,10 +273,11 @@
 	 *
 	 * @param $name String
 	 * @param $default String: optional default (or NULL)
+	 * @param $normalizeUnicode Whether to normalize Unicode in the returned value
 	 * @return String
 	 */
-	public function getVal( $name, $default = null ) {
-		$val = $this->getGPCVal( $this->data, $name, $default );
+	public function getVal( $name, $default = null, $normalizeUnicode = true ) {
+		$val = $this->getGPCVal( $this->data, $name, $default, $normalizeUnicode );
 		if( is_array( $val ) ) {
 			$val = $default;
 		}