Index: tool_arc.c
===================================================================
--- tool_arc.c	(revision 29396)
+++ tool_arc.c	(revision 29397)
@@ -91,9 +91,9 @@
 			pcb_arc_t *arc;
 			pcb_coord_t wx, wy;
 			pcb_angle_t sa, dir;
-
 			wx = hl->tool_x - pcb_crosshair.AttachedBox.Point1.X;
 			wy = hl->tool_y - pcb_crosshair.AttachedBox.Point1.Y;
+pcb_trace("arc: %mm %mm wh %mm %mm\n", hl->tool_x, hl->tool_y, wx, wy);
 			if (PCB_XOR(pcb_crosshair.AttachedBox.otherway, coord_abs(wy) > coord_abs(wx))) {
 				pcb_crosshair.AttachedBox.Point2.X = pcb_crosshair.AttachedBox.Point1.X + coord_abs(wy) * PCB_SGNZ(wx);
 				sa = (wx >= 0) ? 0 : 180;