diff -up authconfig-6.2.8/authconfig-gtk.py.notraceback authconfig-6.2.8/authconfig-gtk.py
--- authconfig-6.2.8/authconfig-gtk.py.notraceback	2014-01-17 15:35:09.000000000 +0100
+++ authconfig-6.2.8/authconfig-gtk.py	2014-01-17 15:38:57.205408031 +0100
@@ -511,6 +511,8 @@ class Authconfig:
 
 	def is_ldap_URI_valid(self, xml):
 		ldapserver = xml.get_widget('ldapserver')
+		if not ldapserver:
+			return True
 		uritovalidate = ldapserver.get_text()
 		return self.info.validateLDAPURI(uritovalidate)