Index: Xlib/support/unix_connect.py
===================================================================
--- Xlib/support/unix_connect.py
+++ Xlib/support/unix_connect.py	2010-09-03 00:49:15.066186229 +0200
@@ -112,7 +112,11 @@
         family = xauth.FamilyLocal
         addr = socket.gethostname()
 
-    au = xauth.Xauthority()
+    try:
+        au = xauth.Xauthority()
+    except error.XauthError:
+        return old_get_auth(sock, dname, host, dno)
+
     while 1:
         try:
             return au.get_best_auth(family, addr, dno)