Index: branches/czw_branch/20120906/psModules/src/imcombine/pmStack.c
===================================================================
--- branches/czw_branch/20120906/psModules/src/imcombine/pmStack.c	(revision 34626)
+++ branches/czw_branch/20120906/psModules/src/imcombine/pmStack.c	(revision 34667)
@@ -1401,4 +1401,5 @@
       }
       combined->image->data.F32[y][x] = stats->robustMedian;
+      combined->mask->data.PS_TYPE_IMAGE_MASK_DATA[y][x] = 0;
     }
   }