=== modified file 'src/mailman/interfaces/address.py'
--- src/mailman/interfaces/address.py	2011-04-16 20:41:50 +0000
+++ src/mailman/interfaces/address.py	2011-08-15 17:29:29 +0000
@@ -45,7 +45,7 @@
         self.address = address
 
     def __str__(self):
-        return self.address
+        return str(self.address)
 
 
 class ExistingAddressError(AddressError):

=== modified file 'src/mailman/interfaces/user.py'
--- src/mailman/interfaces/user.py	2011-04-22 23:26:43 +0000
+++ src/mailman/interfaces/user.py	2011-08-15 17:27:21 +0000
@@ -40,7 +40,7 @@
         self.address = address
 
     def __str__(self):
-        return self.address
+        return str(self.address)