diff -r cbbdd76cd0e4 -r 8964cf2030e9 src/prefs.c
--- a/src/prefs.c	Wed Oct 24 01:42:48 2001 +0000
+++ b/src/prefs.c	Wed Oct 24 04:07:56 2001 +0000
@@ -2585,6 +2585,9 @@
 
 	if (option == OPT_BLIST_SHOW_PIXMAPS)
 		toggle_buddy_pixmaps();
+
+	if (option == OPT_BLIST_GREY_IDLERS)
+		update_idle_times();
 }
 
 static void set_convo_option(GtkWidget *w, int option)