Index: tl-ldap-certalias
===================================================================
--- tl-ldap-certalias	(revision 27083)
+++ tl-ldap-certalias	(working copy)
@@ -68,6 +68,9 @@
         
         self.contents = load_cert(self.raw)
 
+    def is_cert(self):
+        return self.contents is not None
+
     def __getitem__(self, item):
         """A bit of syntactic sugar to allow the Certificate class to
         look like the dict returned by load_cert."""
@@ -873,6 +876,11 @@
                 # Make sure that the certificate is valid.
                 # 
                 c = Certificate(certificate)
+
+                if not c.is_cert():
+                    eprint("Invalid cert on user %s" % dn)
+                    continue
+
                 if not allow_invalid_certificates:
                     (valid, reason) = certificate_is_valid(c)
                     if not valid:
@@ -882,6 +890,7 @@
                         vprint(" Reason: %s" % reason)
                         continue
 
+
                 userlist[uid] += [c]