Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 29004)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 29543)
@@ -540,4 +540,8 @@
 
     psImage *conv = psImageConvolveFFT(NULL, image->image, NULL, 0, kernel); // Convolved image
+
+    // note: do not attempt to renormalize kernels here: cannot have different stars with
+    // different kernel ratios
+
     int x0 = - image->xMin, y0 = - image->yMin; // Position of centre of convolved image
     psKernel *convolved = psKernelAllocFromImage(conv, x0, y0); // Kernel version