another backlinks issue

doc/bugs/backlinks_onhover_thing_can_go_weird.mdwn

@@ -20,3 +20,11 @@ How about doing something a little like [[plugins/toggle]] for the excess
 items instead?
 
 -- [[Jon]]
+
+----
+
+An additional, related issue: if the box expands beyond the bottom of the
+page, you might move your mouse pointer to the scrollbar in order to move
+further down the list, but of course then you are outside the hover region.
+
+-- [[Jon]]