Index: trunk/src/polygon.c
===================================================================
--- trunk/src/polygon.c	(revision 12603)
+++ trunk/src/polygon.c	(revision 12604)
@@ -1057,6 +1057,8 @@
 	else
 		pcb_polyarea_copy0(dst, it->pa);
 
+	clearance *= 2;
+
 	/* care about the outer contours only */
 	pl = pcb_poly_contour(it);
 	if (pl != NULL) {
Index: trunk/src/thermal.c
===================================================================
--- trunk/src/thermal.c	(revision 12603)
+++ trunk/src/thermal.c	(revision 12604)
@@ -469,7 +469,7 @@
 	pcb_pline_t *pl;
 
 	/* add the usual clearance glory around the polygon */
-	pcb_poly_pa_clearance_construct(pres, it, clr*2);
+	pcb_poly_pa_clearance_construct(pres, it, clr);
 
 	pl = pcb_poly_contour(it);
 	if (pl != NULL)