Index: trunk/ppStack/src/ppStackLoop.c
===================================================================
--- trunk/ppStack/src/ppStackLoop.c	(revision 30722)
+++ trunk/ppStack/src/ppStackLoop.c	(revision 31158)
@@ -55,6 +55,5 @@
     }
 
-    // Start threading
-    ppStackThreadInit();
+    // Define threading elements
     ppStackThreadData *stack = ppStackThreadDataSetup(options, config, true);
     if (!stack) {
@@ -114,5 +113,5 @@
     }
 
-    // Final combination
+    // Final combination.  This one does NOT need to be normalized since the convolution takes care of that
     psTrace("ppStack", 2, "Final stack of convolved images....\n");
     if (!ppStackCombineFinal(stack, options->convCovars, options, config, false, false, true)) {
@@ -181,8 +180,7 @@
         }
 
-	// generate the unconvolved stack
+	// generate the unconvolved stack. NOTE: this one must be normalized since the inputs have not been
         psTrace("ppStack", 2, "Stack of unconvolved images....\n");
-        if (!ppStackCombineFinal(stack, options->origCovars, options, config,
-                                 false, true, false)) {
+        if (!ppStackCombineFinal(stack, options->origCovars, options, config, false, true, false)) {
             psError(psErrorCodeLast(), false, "Unable to perform unconvolved combination.");
             psFree(stack);