Index: /branches/eam_branches/20100225/psphot/src/psphotMagnitudes.c
===================================================================
--- /branches/eam_branches/20100225/psphot/src/psphotMagnitudes.c	(revision 27499)
+++ /branches/eam_branches/20100225/psphot/src/psphotMagnitudes.c	(revision 27500)
@@ -80,10 +80,12 @@
     }
 
-    bool IGNORE_GROWTH = psMetadataLookupBool (&status, recipe, "IGNORE_GROWTH");
+    bool IGNORE_GROWTH  = psMetadataLookupBool (&status, recipe, "IGNORE_GROWTH");
     bool INTERPOLATE_AP = psMetadataLookupBool (&status, recipe, "INTERPOLATE_AP");
+    bool DIFF_STATS     = psMetadataLookupBool (&status, recipe, "INTERPOLATE_AP");
 
     pmSourcePhotometryMode photMode = PM_SOURCE_PHOT_APCORR | PM_SOURCE_PHOT_WEIGHT;
     if (!IGNORE_GROWTH) photMode |= PM_SOURCE_PHOT_GROWTH;
     if (INTERPOLATE_AP) photMode |= PM_SOURCE_PHOT_INTERP;
+    if (DIFF_STATS)     photMode |= PM_SOURCE_PHOT_DIFFSTATS;
 
     // choose Cx, Cy (see psphotThreadTools.c for overview of the concepts)