Index: src/wp-includes/default-constants.php
===================================================================
--- src/wp-includes/default-constants.php	(revision 25973)
+++ src/wp-includes/default-constants.php	(working copy)
@@ -42,10 +42,10 @@
 	if ( function_exists( 'memory_get_usage' ) ) {
 		$current_limit = @ini_get( 'memory_limit' );
 		$current_limit_int = intval( $current_limit );
-		if ( false !== stripos( $current_limit, 'G' ) )
+		if ( false !== strpos( $current_limit, 'G' ) )
 			$current_limit_int *= 1024;
 		$wp_limit_int = intval( WP_MEMORY_LIMIT );
-		if ( false !== stripos( WP_MEMORY_LIMIT, 'G' ) )
+		if ( false !== strpos( WP_MEMORY_LIMIT, 'G' ) )
 			$wp_limit_int *= 1024;
 
 		if ( -1 != $current_limit && ( -1 == WP_MEMORY_LIMIT || $current_limit_int < $wp_limit_int ) )
Index: src/wp-includes/l10n.php
===================================================================
--- src/wp-includes/l10n.php	(revision 25973)
+++ src/wp-includes/l10n.php	(working copy)
@@ -797,9 +797,9 @@
 		'Project-Id-Version' => '"Project-Id-Version',
 		'X-Generator'        => '"X-Generator',
 	) );
-	foreach ( $headers as &$header ) {
+	foreach ( $headers as $header => $value ) {
 		// Remove possible contextual '\n' and closing double quote.
-		$header = preg_replace( '~(\\\n)?"$~', '', $header );
+		$headers[ $header ] = preg_replace( '~(\\\n)?"$~', '', $value );
 	}
 	return $headers;
 }