Index: trunk/src/misc.c
===================================================================
--- trunk/src/misc.c	(revision 955)
+++ trunk/src/misc.c	(revision 956)
@@ -112,6 +112,17 @@
   return sqrt(delta_x * delta_x + delta_y * delta_y);
 }
 
+/* Distance2() should be used so that there is only one
+ *  place to deal with overflow/precision errors
+ */
+double
+Distance2 (double x1, double y1, double x2, double y2)
+{
+  double delta_x = (x2 - x1);
+  double delta_y = (y2 - y1);
+  return delta_x * delta_x + delta_y * delta_y;
+}
+
 /* Bring an angle into [0, 360) range */
 Angle
 NormalizeAngle (Angle a)
Index: trunk/src/misc.h
===================================================================
--- trunk/src/misc.h	(revision 955)
+++ trunk/src/misc.h	(revision 956)
@@ -45,6 +45,7 @@
 } UnitList[];
 
 double Distance (double x1, double y1, double x2, double y2);
+double Distance2 (double x1, double y1, double x2, double y2); /* distance square */
 Angle  NormalizeAngle (Angle a);
 
 char *pcb_author (void);
Index: trunk/src/search.h
===================================================================
--- trunk/src/search.h	(revision 955)
+++ trunk/src/search.h	(revision 956)
@@ -72,14 +72,14 @@
 
 /* == the same but accept if any part of the object touches the box == */
 #define POINT_IN_CIRCLE(x, y, cx, cy, r) \
-	(((x)-(cx)) * ((x)-(cx)) + ((y)-(cy)) * ((y)-(cy)) <= (r)*(r))
+	(Distance2(x, y, cx, cy) <= (double)(r) * (double)(r))
 
-#define CIRCLE_TOUCH_BOX(cx, cy, r, b) \
+#define CIRCLE_TOUCHES_BOX(cx, cy, r, b) \
 	(    POINT_IN_BOX((cx)-(r),(cy),(b)) || POINT_IN_BOX((cx)+(r),(cy),(b)) || POINT_IN_BOX((cx),(cy)-(r),(b)) || POINT_IN_BOX((cx),(cy)+(r),(b)) \
 	  || POINT_IN_CIRCLE((b)->X1, (b)->Y1, (cx), (cy), (r)) || POINT_IN_CIRCLE((b)->X2, (b)->Y1, (cx), (cy), (r)) || POINT_IN_CIRCLE((b)->X1, (b)->Y2, (cx), (cy), (r)) || POINT_IN_CIRCLE((b)->X2, (b)->Y2, (cx), (cy), (r)))
 
 #define	VIA_OR_PIN_TOUCHES_BOX(v,b) \
-	CIRCLE_TOUCH_BOX((v)->X,(v)->Y,((v)->Thickness + (v)->DrillingHole/2),(b))
+	CIRCLE_TOUCHES_BOX((v)->X,(v)->Y,((v)->Thickness + (v)->DrillingHole/2),(b))
 
 #define	LINE_TOUCHES_BOX(l,b)	\
 	(    lines_intersect((l)->Point1.X,(l)->Point1.Y,(l)->Point2.X,(l)->Point2.Y, (b)->X1, (b)->Y1, (b)->X2, (b)->Y1) \