Index: /trunk/ippTools/src/detselect.c
===================================================================
--- /trunk/ippTools/src/detselect.c	(revision 11426)
+++ /trunk/ippTools/src/detselect.c	(revision 11427)
@@ -152,6 +152,10 @@
             }
 
+            // the == NULL tests invokes some psDB magic to make an OR
+            // conditional query
             psMetadataAddTime(where, PS_LIST_TAIL, "time_begin", 0, "<=", time);
+            psMetadataAddTime(where, PS_LIST_TAIL, "time_begin", PS_META_DUPLICATE_OK, "==", NULL);
             psMetadataAddTime(where, PS_LIST_TAIL, "time_end", 0, ">=", time);
+            psMetadataAddTime(where, PS_LIST_TAIL, "time_end", PS_META_DUPLICATE_OK, "==", NULL);
             psFree(time);
         }