Index: trunk/ppSub/src/ppSubReadoutPhotometry.c
===================================================================
--- trunk/ppSub/src/ppSubReadoutPhotometry.c	(revision 26982)
+++ trunk/ppSub/src/ppSubReadoutPhotometry.c	(revision 29003)
@@ -97,4 +97,10 @@
     psAssert (sources, "missing sources?");
 
+    // a likely source of false positives is poor subtractions.  this results in
+    // detections in the wings (or cores) of bright(er) stars found in both images.
+    // flag detections based on their distance from the bright(er) input sources.
+    bool matchRef = !strcasecmp(name, "PPSUB.INVERSE");
+    ppSubFlagNeighbors (config, view, sources, matchRef);
+
     if (data->stats) {
         bool mdok;