Index: dsn.c
===================================================================
--- dsn.c	(revision 6649)
+++ dsn.c	(revision 6650)
@@ -81,6 +81,8 @@
 					pcb_message(PCB_MSG_ERROR, "import_dsn: skipping polyline segment because x coord is invalid: %s\n", sy);
 					continue;
 				}
+				if (y < PCB_MM_TO_COORD(0.01)) /* workaround for broken polyline coords */
+					continue;
 				(*nlines)++;
 				if (pn > 0) {
 					pcb_line_t *line = pcb_line_new_merge(layer, lx, PCB->MaxHeight - ly,