Index: wp-includes/load.php
===================================================================
--- wp-includes/load.php	(revision 18916)
+++ wp-includes/load.php	(working copy)
@@ -90,6 +90,10 @@
 	$PHP_SELF = $_SERVER['PHP_SELF'];
 	if ( empty( $PHP_SELF ) )
 		$_SERVER['PHP_SELF'] = $PHP_SELF = preg_replace( '/(\?.*)?$/', '', $_SERVER["REQUEST_URI"] );
+		
+	// Fix for HTTP/1.0 clients that include absolute URI in request
+	if( strpos( $_SERVER['REQUEST_URI'], $_SERVER['HTTP_HOST'] ) !== false )
+		$_SERVER['REQUEST_URI'] = preg_replace( '|^https?://' . preg_quote( $_SERVER['HTTP_HOST'] ) . '|', '', $_SERVER['REQUEST_URI'] );
 }
 
 /**