Index: trunk/doc/TODO
===================================================================
--- trunk/doc/TODO	(revision 31862)
+++ trunk/doc/TODO	(revision 31863)
@@ -16,6 +16,7 @@
 
 2. For later releases ===============================================================================
 - CLEANUP: move layer_parse_group_str() from core to io_pcb, probably together with the default stackup setup code [report: Igor2]
+- CLEANUP: TODO27: undo's removed list shouldn't depend on pobject IDs but probably remove list index because IDs are not unique if we want our operations to retrain IDs. Repro: shift-click subc replace twice, then undo; or drag&drop move selected object and undo [report: Igor2]
 - CLEANUP/BUG: undo operation while drawing a multiple segment line doesn't change segment attached to the crosshair [report:wojciechk8]
 	- tool_line.c depends on pcb_undo()'s return value; can be fixed only when the old undo system is removed
 - CLEANUP/BUG: bug_files/pstk_offs.lht - most of the code gets confused if a padstack's shape is far away from the padstack origin; try {c r} or {c f} on R8-1; need to cache hole vs. shape overlap (1 bit per shape in the proto) [report: igor2]
Index: trunk/src/obj_subc.c
===================================================================
--- trunk/src/obj_subc.c	(revision 31862)
+++ trunk/src/obj_subc.c	(revision 31863)
@@ -2375,7 +2375,7 @@
 	pcb_obj_id_del(data, placed);
 /* NOTE: Can not keep ID because that would fool the undo system: double-replace
    a subc and there will be two instances with the same ID on the undo list
-   and searching by ID will get fooled! */
+   and searching by ID will get fooled! TODO27 */
 /*	placed->ID = target_id;*/ (void)target_id;
 	pcb_obj_id_reg(data, placed);
 	placed->Flags.f &= ~fmask;
Index: trunk/src_plugins/tool_std/tool_buffer.c
===================================================================
--- trunk/src_plugins/tool_std/tool_buffer.c	(revision 31862)
+++ trunk/src_plugins/tool_std/tool_buffer.c	(revision 31863)
@@ -79,7 +79,7 @@
 
 	if (pcb_crosshair_note.Moving) { /* release of a drag&drop move of selected objects */
 		pcb_undo_restore_serial();
-		/* NOTE: can not keep ids:
+		/* NOTE: can not keep ids: TODO27:
 		    1. select an object, id #9
 		    2. drag&drop move
 		    3. drag&drop move it again (still selected)