Index: trunk/src/buffer.c
===================================================================
--- trunk/src/buffer.c	(revision 27542)
+++ trunk/src/buffer.c	(revision 27543)
@@ -120,6 +120,7 @@
 			pcb_data_bind_board_layers(pcb, Buffer->Data, 0);
 	}
 	Buffer->from_outside = 0;
+	free(Buffer->source_path); Buffer->source_path = NULL;
 }
 
 void pcb_buffer_clear(pcb_board_t *pcb, pcb_buffer_t *Buffer)
@@ -157,6 +158,7 @@
 		Buffer->Y = pcb_crosshair.Y;
 	}
 	Buffer->from_outside = 0;
+	free(Buffer->source_path); Buffer->source_path = NULL;
 	pcb_notify_crosshair_change(pcb_true);
 }
 
@@ -228,6 +230,7 @@
 		pcb_data_binding_update(pcb, Buffer->Data);
 		pcb_board_remove(newPCB);
 		Buffer->from_outside = 1;
+		free(Buffer->source_path); Buffer->source_path = pcb_strdup(Filename);
 		PCB = orig;
 		pcb_layergrp_inhibit_dec();
 		return pcb_true;
@@ -240,6 +243,7 @@
 	PCB = orig;
 	pcb_layergrp_inhibit_dec();
 	Buffer->from_outside = 0;
+	free(Buffer->source_path); Buffer->source_path = NULL;
 	return pcb_false;
 }
 
@@ -749,6 +753,7 @@
 		Buffer->X = 0;
 		Buffer->Y = 0;
 		Buffer->from_outside = 1;
+		free(Buffer->source_path); Buffer->source_path = pcb_strdup(Name);
 
 		if (pcb_subclist_length(&Buffer->Data->subc)) {
 			pcb_subc_t *subc = pcb_subclist_first(&Buffer->Data->subc);
Index: trunk/src/buffer.h
===================================================================
--- trunk/src/buffer.h	(revision 27542)
+++ trunk/src/buffer.h	(revision 27543)
@@ -40,6 +40,7 @@
 	pcb_box_t bbox_naked;
 	pcb_data_t *Data;       /* data; not all members of pcb_board_t */
 	int from_outside;       /* data is coming from outside of the current board (lib, loaded board) */
+	char *source_path;      /* when from the outside, this field may remember the full path of the original source file */
 };
 
 /* Recalculates the bounding box of the buffer; returns 0 on success */