Index: pstk_compat.c
===================================================================
--- pstk_compat.c	(revision 19505)
+++ pstk_compat.c	(revision 19506)
@@ -338,6 +338,8 @@
 			if (shp->data.poly.len == 8)
 				return get_old_shape_octa(dia, shp);
 			break;
+		case PCB_PSSH_HSHADOW:
+			break;
 	}
 	return PCB_PSTK_COMPAT_INVALID;
 }
@@ -611,6 +613,8 @@
 	/* require all shapes to be concentric */
 	for(n = 1; n < tshp->len; n++) {
 		switch(tshp->shape[0].shape) {
+			case PCB_PSSH_HSHADOW:
+				return pcb_false;
 			case PCB_PSSH_LINE:
 				if (tshp->shape[0].data.line.x1 != tshp->shape[n].data.line.x1)
 					return pcb_false;
@@ -667,6 +671,8 @@
 			*thickness = lt[coppern];
 			*mask = lt[maskn];
 			break;
+		case PCB_PSSH_HSHADOW:
+			break;
 	}
 
 	*clearance = (ps->Clearance > 0 ? ps->Clearance : tshp->shape[0].clearance) * 2;