Index: trunk/ppBackground/src/ppBackgroundStack.h
===================================================================
--- trunk/ppBackground/src/ppBackgroundStack.h	(revision 36615)
+++ trunk/ppBackground/src/ppBackgroundStack.h	(revision 36635)
@@ -23,8 +23,15 @@
 
   psImageMap *modelMap;
+  // These are the full extent of the input data
   psF32 ra_min;
   psF32 ra_max;
   psF32 dec_min;
   psF32 dec_max;
+
+  // Because the binning code can't handle subsections sanely, these hold the working subsection.
+  psF32 x_min;
+  psF32 x_max;
+  psF32 y_min;
+  psF32 y_max;
 
   psArray *stack_data;