Index: trunk/packages/sipb-xen-www/code/validation.py
===================================================================
--- trunk/packages/sipb-xen-www/code/validation.py	(revision 430)
+++ trunk/packages/sipb-xen-www/code/validation.py	(revision 431)
@@ -163,5 +163,8 @@
             return admin
     except getafsgroups.AfsProcessError, e:
-        raise InvalidInput('administrator', admin, str(e))
+        errmsg = str(e)
+        if errmsg.startswith("pts: User or group doesn't exist"):
+            errmsg = 'The group "%s" does not exist.' % admin
+        raise InvalidInput('administrator', admin, errmsg)
     #XXX Should we require that user is in the admin group?
     return admin