Index: trunk/src/board.c
===================================================================
--- trunk/src/board.c	(revision 18003)
+++ trunk/src/board.c	(revision 18004)
@@ -162,8 +162,10 @@
 
 	/* copy default settings */
 	for (i = 0; i < PCB_MAX_LAYER; i++)
-		if ((ptr->Data->Layer[i].meta.real.color == NULL) || (ptr->Data->Layer[i].meta.real.color[0] == '\0'))
-			ptr->Data->Layer[i].meta.real.color = pcb_layer_default_color(i, pcb_layer_flags(ptr, i));
+		if ((ptr->Data->Layer[i].meta.real.color == NULL) || (ptr->Data->Layer[i].meta.real.color[0] == '\0')) {
+			free(ptr->Data->Layer[i].meta.real.color);
+			ptr->Data->Layer[i].meta.real.color = pcb_strdup(pcb_layer_default_color(i, pcb_layer_flags(ptr, i)));
+		}
 }
 
 typedef struct {
Index: trunk/src/layer.c
===================================================================
--- trunk/src/layer.c	(revision 18003)
+++ trunk/src/layer.c	(revision 18004)
@@ -147,6 +147,7 @@
 			pcb_r_destroy_tree(&layer->text_tree);
 		if (layer->polygon_tree)
 			pcb_r_destroy_tree(&layer->polygon_tree);
+		free(layer->meta.real.color);
 	}
 	free((char *)layer->name);
 	memset(layer, 0, sizeof(pcb_layer_t));
@@ -505,7 +506,7 @@
 	lp->meta.real.grp = gid;
 	lp->meta.real.vis = 1;
 	lp->name = pcb_strdup("New Layer");
-	lp->meta.real.color = pcb_layer_default_color(idx, (gid >= 0) ? pcb->LayerGroups.grp[gid].ltype : 0);
+	lp->meta.real.color = pcb_strdup(pcb_layer_default_color(idx, (gid >= 0) ? pcb->LayerGroups.grp[gid].ltype : 0));
 	if ((gid >= 0) && (pcb->LayerGroups.grp[gid].len == 0)) { /*When adding the first layer in a group, set up comb flags automatically */
 		switch((pcb->LayerGroups.grp[gid].ltype) & PCB_LYT_ANYTHING) {
 			case PCB_LYT_MASK:  lp->comb = PCB_LYC_AUTO | PCB_LYC_SUB; break;
Index: trunk/src/layer.h
===================================================================
--- trunk/src/layer.h	(revision 18003)
+++ trunk/src/layer.h	(revision 18004)
@@ -118,7 +118,7 @@
 		struct { /* A real board layer */
 			pcb_layergrp_id_t grp;         /* the group this layer is in (cross-reference) */
 			pcb_bool vis;                  /* visible flag */
-			const char *color;             /* color */
+			char *color;                   /* strdup'd */
 			int no_drc;                    /* whether to ignore the layer when checking the design rules */
 			const char *cookie;            /* for UI layers: registration cookie; NULL for unused UI layers */
 		} real;
Index: trunk/src/layer_ui.c
===================================================================
--- trunk/src/layer_ui.c	(revision 18003)
+++ trunk/src/layer_ui.c	(revision 18004)
@@ -58,7 +58,7 @@
 	l = vtlayer_alloc_append(&pcb_uilayer, 1);
 found:;
 	l->meta.real.cookie = cookie;
-	l->meta.real.color = color;
+	l->meta.real.color = pcb_strdup(color);
 	l->name = pcb_strdup(name);
 	l->meta.real.vis = 1;
 	pcb_event(PCB_EVENT_LAYERS_CHANGED, NULL);