Index: trunk/psModules/src/imcombine/pmSubtractionMask.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMask.c	(revision 27365)
+++ trunk/psModules/src/imcombine/pmSubtractionMask.c	(revision 27400)
@@ -92,4 +92,14 @@
                     continue;
                 }
+                if (imageData1[y][x] > 50000) {
+                    maskData1[y][x] = maskVal;
+                    numBad++;
+                    continue;
+                }
+                if (imageData2[y][x] > 50000) {
+                    maskData2[y][x] = maskVal;
+                    numBad++;
+                    continue;
+                }
                 xMin = PS_MIN(xMin, x);
                 xMax = PS_MAX(xMax, x);