diff -urN cui88/cui.c cui89/cui.c
--- cui88/cui.c	Mon Mar 31 01:00:00 2014
+++ cui89/cui.c	Mon Mar 31 02:00:00 2014
@@ -105,19 +105,16 @@
 	int n = strlen(s);
 	char *s2 = NULL;
 
-cui_dbg_here("ck1");
+	if(!cui_is_visible(obj)) return;
 	if(!cui_visible_rect(obj, r1)) return;
-cui_dbg_here("ck2");
 	cui_rect_init(r2, x, y, n, 1);
 	if(!cui_rect_and(r1, r2, r2)) return; /* r1 and r2 --> r2 */
-cui_dbg_here("ck3");
 	if(cui_clip){
 		*r1 = *cui_clip;
 		r1->x = cui_lx(obj, r1->x);
 		r1->y = cui_ly(obj, r1->y);
 		if(!cui_rect_and(r1, r2, r2)) return;
 	}
-cui_dbg_here("ck4");
 
 	s += r2->x - x;
 	if(r2->x + r2->w < x + n){
diff -urN cui88/term.c cui89/term.c
--- cui88/term.c	Mon Mar 31 01:00:00 2014
+++ cui89/term.c	Mon Mar 31 02:00:00 2014
@@ -53,9 +53,7 @@
 
 	if(*attr == -1) return;
 	*lp = '\0';
-cui_dbg_enable = 1;
 	cui_draw_str(obj, x, y, p->lbuf, *attr & ~UPDATE_FLG);
-cui_dbg_enable = 0;
 	*attr = -1;
 }