Index: trunk/psModules/src/imcombine/pmSubtractionEquation.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionEquation.c	(revision 19299)
+++ trunk/psModules/src/imcombine/pmSubtractionEquation.c	(revision 19532)
@@ -1085,5 +1085,5 @@
             }
         }
-        deviations->data.F32[i] = sqrtf(devNorm * deviation);
+        deviations->data.F32[i] = devNorm * deviation;
         psTrace("psModules.imcombine", 5, "Deviation for stamp %d (%d,%d): %f\n",
                 i, (int)(stamp->x + 0.5), (int)(stamp->y + 0.5), deviations->data.F32[i]);