Index: trunk/src/board.c
===================================================================
--- trunk/src/board.c	(revision 27926)
+++ trunk/src/board.c	(revision 27927)
@@ -287,7 +287,7 @@
 /* sets a new line thickness */
 void pcb_board_set_line_width(pcb_coord_t Size)
 {
-	if (Size >= PCB_MIN_LINESIZE && Size <= PCB_MAX_LINESIZE) {
+	if (Size >= PCB_MIN_THICKNESS && Size <= PCB_MAX_THICKNESS) {
 		conf_set_design("design/line_thickness", "%$mS", Size);
 		if (conf_core.editor.auto_drc)
 			pcb_crosshair_grid_fit(pcb_crosshair.X, pcb_crosshair.Y);
@@ -313,7 +313,7 @@
 /* sets a clearance width */
 void pcb_board_set_clearance(pcb_coord_t Width)
 {
-	if (Width <= PCB_MAX_LINESIZE) {
+	if (Width <= PCB_MAX_THICKNESS) {
 		conf_set_design("design/clearance", "%$mS", Width);
 	}
 }
Index: trunk/src/conf_core.c
===================================================================
--- trunk/src/conf_core.c	(revision 27926)
+++ trunk/src/conf_core.c	(revision 27927)
@@ -20,7 +20,7 @@
 
 static void conf_core_postproc(void)
 {
-	conf_clamp_to(CFT_COORD, conf_core.design.line_thickness, PCB_MIN_LINESIZE, PCB_MAX_LINESIZE, PCB_MIL_TO_COORD(10));
+	conf_clamp_to(CFT_COORD, conf_core.design.line_thickness, PCB_MIN_THICKNESS, PCB_MAX_THICKNESS, PCB_MIL_TO_COORD(10));
 	conf_force_set_bool(conf_core.rc.have_regex, 1);
 	pcb_conf_ro("rc/have_regex");
 
Index: trunk/src/globalconst.h
===================================================================
--- trunk/src/globalconst.h	(revision 27926)
+++ trunk/src/globalconst.h	(revision 27927)
@@ -36,8 +36,8 @@
 #define PCB_MAX_LAYER        38    /* max number of layer, check source code for more changes, a *lot* more changes */
 /* new array size that allows substrate layers */
 #define PCB_MAX_LAYERGRP     ((PCB_MAX_LAYER+8)*2)    /* max number of layer groups, a.k.a. physical layers: a few extra outer layers per side, pluse one substrate per real layer */
-#define PCB_MIN_LINESIZE     PCB_MIL_TO_COORD(0.01)	/* thickness of lines */
-#define PCB_MAX_LINESIZE     ((pcb_coord_t)PCB_LARGE_VALUE)
+#define PCB_MIN_THICKNESS    0
+#define PCB_MAX_THICKNESS    ((pcb_coord_t)PCB_LARGE_VALUE)
 #define PCB_MIN_ARCSIZE      PCB_MIL_TO_COORD(0.01)
 #define PCB_MAX_ARCSIZE      ((pcb_coord_t)PCB_LARGE_VALUE)
 #define PCB_MIN_TEXTSCALE    10 /* scaling of text objects in percent */
Index: trunk/src/obj_arc.c
===================================================================
--- trunk/src/obj_arc.c	(revision 27926)
+++ trunk/src/obj_arc.c	(revision 27927)
@@ -426,7 +426,7 @@
 
 	if (PCB_FLAG_TEST(PCB_FLAG_LOCK, Arc))
 		return NULL;
-	if (value <= PCB_MAX_LINESIZE && value >= PCB_MIN_LINESIZE && value != Arc->Thickness) {
+	if (value <= PCB_MAX_THICKNESS && value >= PCB_MIN_THICKNESS && value != Arc->Thickness) {
 		pcb_undo_add_obj_to_size(PCB_OBJ_ARC, Layer, Arc, Arc);
 		pcb_arc_invalidate_erase(Arc);
 		pcb_r_delete_entry(Layer->arc_tree, (pcb_box_t *) Arc);
@@ -450,7 +450,7 @@
 		return NULL;
 	if (value < 0)
 		value = 0;
-	value = MIN(PCB_MAX_LINESIZE, value);
+	value = MIN(PCB_MAX_THICKNESS, value);
 	if (!ctx->chgsize.is_absolute && ctx->chgsize.value < 0 && value < conf_core.design.bloat * 2)
 		value = 0;
 	if (ctx->chgsize.value > 0 && value < conf_core.design.bloat * 2)
Index: trunk/src/obj_line.c
===================================================================
--- trunk/src/obj_line.c	(revision 27926)
+++ trunk/src/obj_line.c	(revision 27927)
@@ -466,7 +466,7 @@
 
 	if (PCB_FLAG_TEST(PCB_FLAG_LOCK, Line))
 		return NULL;
-	if (value <= PCB_MAX_LINESIZE && value >= PCB_MIN_LINESIZE && value != Line->Thickness) {
+	if (value <= PCB_MAX_THICKNESS && value >= PCB_MIN_THICKNESS && value != Line->Thickness) {
 		pcb_undo_add_obj_to_size(PCB_OBJ_LINE, Layer, Line, Line);
 		pcb_line_invalidate_erase(Line);
 		pcb_r_delete_entry(Layer->line_tree, (pcb_box_t *) Line);
@@ -490,7 +490,7 @@
 		return NULL;
 	if (value < 0)
 		value = 0;
-	value = MIN(PCB_MAX_LINESIZE, value);
+	value = MIN(PCB_MAX_THICKNESS, value);
 	if (!ctx->chgsize.is_absolute && ctx->chgsize.value < 0 && value < conf_core.design.bloat * 2)
 		value = 0;
 	if (ctx->chgsize.value > 0 && value < conf_core.design.bloat * 2)
Index: trunk/src/obj_poly.c
===================================================================
--- trunk/src/obj_poly.c	(revision 27926)
+++ trunk/src/obj_poly.c	(revision 27927)
@@ -561,7 +561,7 @@
 		if (PCB_FLAG_TEST(PCB_FLAG_LOCK, poly))
 			return NULL;
 
-		value = MIN(PCB_MAX_LINESIZE, value);
+		value = MIN(PCB_MAX_THICKNESS, value);
 		if (!ctx->chgsize.is_absolute && ctx->chgsize.value < 0 && value < conf_core.design.bloat * 2)
 			value = 0;
 		if (ctx->chgsize.value > 0 && value < conf_core.design.bloat * 2)
Index: trunk/src/obj_pstk_op.c
===================================================================
--- trunk/src/obj_pstk_op.c	(revision 27926)
+++ trunk/src/obj_pstk_op.c	(revision 27927)
@@ -290,7 +290,7 @@
 		return NULL;
 	if (value < 0)
 		value = 0;
-	value = MIN(PCB_MAX_LINESIZE, value);
+	value = MIN(PCB_MAX_THICKNESS, value);
 	if (!ctx->chgsize.is_absolute && (ctx->chgsize.value < 0) && (value < conf_core.design.bloat))
 		value = 0;
 	if ((ctx->chgsize.value > 0) && (value < conf_core.design.bloat))