diff --git a/rmacs/TODO b/rmacs/TODO
index 3dd9639..3e05605 100644
--- a/rmacs/TODO
+++ b/rmacs/TODO
@@ -1,6 +1,10 @@
 Make it reloadable
 
 The status line isn't cleared away when you C-x 0.
+ - CLUE: also happens when the window is very narrow and a large jump
+   would clear entire lines, but the lines to be cleared span the
+   entire window. For example, M-> in xterm_controls.txt when the
+   window is ~20 chars wide.
 
 Preserve column on up/down better.