Index: cnc_text_dyn.c
===================================================================
--- cnc_text_dyn.c	(revision 2132)
+++ cnc_text_dyn.c	(revision 2133)
@@ -132,14 +132,24 @@
 
 void csch_text_dyntext_render(csch_text_t *text)
 {
+	const char *empty = "<empty>";
 	csch_text_dyntext_inval(text);
 
 	if (text->dyntext) {
 		gds_t tmp = {0};
 		rnd_subst_append(&tmp, text->text, csch_text_render_str_cb, (void *)text, RND_SUBST_PERCENT | RND_SUBST_CONF, 0);
-		text->rtext = tmp.array;
+		if ((tmp.array == NULL) || (*tmp.array == '\0')) {
+			text->rtext = rnd_strdup(empty);
+			gds_uninit(&tmp);
+		}
+		else
+			text->rtext = tmp.array;
 	}
-	else
-		text->rtext = rnd_strdup(text->text);
+	else {
+		if ((text->text == NULL) || (*text->text == '\0'))
+			text->rtext = rnd_strdup(empty);
+		else
+			text->rtext = rnd_strdup(text->text);
+	}
 }