Index: /trunk/psphot/src/psphotFindPeaks.c
===================================================================
--- /trunk/psphot/src/psphotFindPeaks.c	(revision 13429)
+++ /trunk/psphot/src/psphotFindPeaks.c	(revision 13430)
@@ -89,4 +89,7 @@
     // thus, the threshold is: 
     float effArea = 4.0*M_PI*PS_SQR(SIGMA_SMTH);
+    if (effArea < 1) {
+	effArea = 1;			// never less than a pixel
+    }
     float threshold = PS_SQR(NSIGMA_PEAK) / effArea;