Index: trunk/DataStoreServer/scripts/dsreg
===================================================================
--- trunk/DataStoreServer/scripts/dsreg	(revision 24196)
+++ trunk/DataStoreServer/scripts/dsreg	(revision 25667)
@@ -203,8 +203,8 @@
                 $new_last_fs = $new_newest->{fileset_name};
             } else {
-                $new_last_fs = "none";
+                $new_last_fs = undef;
             }
             $stmt->finish();
-            $dbh->do("UPDATE dsProduct SET last_fs = \'$new_last_fs\' WHERE prod_id = $prod_id");
+            $dbh->do("UPDATE dsProduct SET last_fs = ? WHERE prod_id = $prod_id", undef, ($new_last_fs));
         }
         $dbh->commit();