Index: trunk/src/hid_cam.c
===================================================================
--- trunk/src/hid_cam.c	(revision 27681)
+++ trunk/src/hid_cam.c	(revision 27682)
@@ -581,6 +581,7 @@
 		memset(&ctx, 0, sizeof(ctx));
 		ctx.cam = dst;
 		ctx.vars = pcb_cam_vars;
+		free(dst->fn);
 		dst->fn = pcb_strdup_subst(dst->fn_template, cam_update_name_cb, &ctx, PCB_SUBST_HOME | PCB_SUBST_PERCENT | PCB_SUBST_CONF);
 		*fn_out = dst->fn;
 		/* note: dst->active is not set so that layer selection is not altered */