--- misc/libxml2-2.7.6/uri.c	2009-10-02 17:28:55.000000000 +0200
+++ misc/build/libxml2-2.7.6/uri.c	2011-02-24 13:47:19.349299000 +0100
@@ -2479,7 +2479,16 @@
     if (path == NULL)
 	return(NULL);
 
-    /* sanitize filename starting with // so it can be used as URI */
+#if defined(_WIN32) 	
+	//We must not change the backslashes to slashes if the the path starts with
+	// \\?\
+	//Those pathes can be up to 32k characters long.
+	len = xmlStrlen(path);
+	if ((len > 3) && (path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') && (path[3] == '\\') )
+		return xmlStrdup((const xmlChar *) path);
+#endif
+
+	/* sanitize filename starting with // so it can be used as URI */
     if ((path[0] == '/') && (path[1] == '/') && (path[2] != '/'))
         path++;
 
--- misc/libxml2-2.7.6/xmlIO.c	2009-09-24 17:32:00.000000000 +0200
+++ misc/build/libxml2-2.7.6/xmlIO.c	2011-02-24 13:47:26.163762000 +0100
@@ -772,6 +772,11 @@
 
 #ifdef HAVE_STAT
 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
+	//On Windows stat and wstat do not work with long pathname, 
+	//which start with '\\?\'
+	if ((xmlStrlen(path) > 3) && (path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') && (path[3] == '\\') )
+		return 1;
+
     if (xmlWrapStat(path, &stat_buffer) == -1)
         return 0;
 #else