Index: trunk/src/buffer.c
===================================================================
--- trunk/src/buffer.c	(revision 17094)
+++ trunk/src/buffer.c	(revision 17095)
@@ -431,7 +431,7 @@
 
 	PCB_PADSTACK_LOOP(Buffer->Data);
 	{
-		pcb_pstk_mirror(padstack, 0, 1, 0);
+		pcb_pstk_mirror(padstack, PCB_PSTK_DONT_MIRROR_COORDS, 1, 0);
 	}
 	PCB_END_LOOP;
 	PCB_LINE_ALL_LOOP(Buffer->Data);
Index: trunk/src/obj_pstk.c
===================================================================
--- trunk/src/obj_pstk.c	(revision 17094)
+++ trunk/src/obj_pstk.c	(revision 17095)
@@ -861,7 +861,7 @@
 
 	/* if mirror center is not 0, also move, to emulate that the mirror took
 	   place around that point */
-	if (y_offs != 0) {
+	if (((y_offs != 0) || (ps->y != 0)) && (y_offs != PCB_PSTK_DONT_MIRROR_COORDS)) {
 		pcb_poly_restore_to_poly(ps->parent.data, PCB_OBJ_PSTK, NULL, ps);
 		pcb_pstk_invalidate_erase(ps);
 		if (ps->parent.data->padstack_tree != NULL)
Index: trunk/src/obj_pstk.h
===================================================================
--- trunk/src/obj_pstk.h	(revision 17094)
+++ trunk/src/obj_pstk.h	(revision 17095)
@@ -187,10 +187,12 @@
 void pcb_pstk_proto_del_shape(pcb_pstk_proto_t *proto, pcb_layer_type_t lyt, pcb_layer_combining_t comb);
 void pcb_pstk_proto_del_shape_idx(pcb_pstk_proto_t *proto, int idx);
 
+#define PCB_PSTK_DONT_MIRROR_COORDS PCB_MAX_COORD
 /* Mirror a padstack (useful for sending to the other side - set swap_side to 1 in that case)
    Disabling xmirror is useful if side needs to be swapped but coordinates
    are already mirrored so they represent the other-side geometry (e.g. when
-   importing from old pcb formats) */
+   importing from old pcb formats). If y_offs is PCB_PSTK_DONT_MIRROR_COORDS,
+   do not change the y coord */
 void pcb_pstk_mirror(pcb_pstk_t *ps, pcb_coord_t y_offs, int swap_side, int disable_xmirror);
 
 /* Rotate in place (op wrapper) */
Index: trunk/src_plugins/io_lihata/read.c
===================================================================
--- trunk/src_plugins/io_lihata/read.c	(revision 17094)
+++ trunk/src_plugins/io_lihata/read.c	(revision 17095)
@@ -1076,7 +1076,7 @@
 		pcb_attribute_put(&ps->Attributes, "name", Name);
 
 	if (subc_on_bottom)
-		pcb_pstk_mirror(ps, 0, 1, 0);
+		pcb_pstk_mirror(ps, PCB_PSTK_DONT_MIRROR_COORDS, 1, 0);
 
 	return err;
 }
@@ -1114,7 +1114,7 @@
 		pcb_attribute_put(&p->Attributes, "name", Name);
 
 	if (subc_on_bottom)
-		pcb_pstk_mirror(p, 0, 1, 0);
+		pcb_pstk_mirror(p, PCB_PSTK_DONT_MIRROR_COORDS, 1, 0);
 
 	parse_id(&p->ID, obj, 4);
 	pcb_attrib_compat_set_intconn(&p->Attributes, intconn);
Index: trunk/src_plugins/io_pcb/file.c
===================================================================
--- trunk/src_plugins/io_pcb/file.c	(revision 17094)
+++ trunk/src_plugins/io_pcb/file.c	(revision 17095)
@@ -1021,7 +1021,7 @@
 		pcb_attribute_put(&p->Attributes, "name", Name);
 
 	if (yysubc_bottom)
-		pcb_pstk_mirror(p, 0, 1, 0);
+		pcb_pstk_mirror(p, PCB_PSTK_DONT_MIRROR_COORDS, 1, 0);
 	return p;
 }
 
@@ -1038,7 +1038,7 @@
 	if (yysubc_bottom) {
 		pcb_data_t *old_hack = pcb_pstk_data_hack;
 		pcb_pstk_data_hack = subc->parent.data;
-		pcb_pstk_mirror(p, 0, 1, 1);
+		pcb_pstk_mirror(p, PCB_PSTK_DONT_MIRROR_COORDS, 1, 1);
 		pcb_pstk_data_hack = old_hack;
 	}