Index: /branches/eam_branches/ipp-20111110/psphot/src/psphotRadialApertures.c
===================================================================
--- /branches/eam_branches/ipp-20111110/psphot/src/psphotRadialApertures.c	(revision 32691)
+++ /branches/eam_branches/ipp-20111110/psphot/src/psphotRadialApertures.c	(revision 32692)
@@ -156,5 +156,5 @@
 
 	    // set this to 0 to run without threading
-# if (0)	    
+# if (1)	    
             if (!psThreadJobAddPending(job)) {
                 psError(PS_ERR_UNKNOWN, false, "Unable to guess model.");
Index: /branches/eam_branches/ipp-20111110/psphot/src/psphotStackChisqImage.c
===================================================================
--- /branches/eam_branches/ipp-20111110/psphot/src/psphotStackChisqImage.c	(revision 32691)
+++ /branches/eam_branches/ipp-20111110/psphot/src/psphotStackChisqImage.c	(revision 32692)
@@ -13,4 +13,6 @@
     psAssert (chisqFile, "missing chisq image FPA?");
 
+    // the readout containing the chisq image is generated in the first pass of this loop and
+    // used by the successive passes
     pmReadout *chiReadout = NULL;