diff -urN cui70/scbar.c cui71/scbar.c
--- cui70/scbar.c	Sun Feb  9 22:00:00 2014
+++ cui71/scbar.c	Sun Feb  9 23:00:00 2014
@@ -45,7 +45,9 @@
 {
 	cui_scbar p = (cui_scbar)obj;
 	int pos_max = cui_scbar_thumb_pos_max(obj);
-	return pos * p->max_v / pos_max;
+	int vs = (pos * (p->max_v + 1) + pos_max) / (pos_max + 1);
+	int ve = ((pos + 1) * (p->max_v + 1) + pos_max) / (pos_max + 1) - 1;
+	return vs + (ve - vs) * pos / pos_max;
 }
 
 void