[Orgmode] bug? - can't set effort from agenda

[George Pearson]

Running org 7.01h and emacs 23.2.1 on windows XP.

Typing "e" on a task in the daily agenda goes through the steps of
setting the effort, but the change is NOT made in the original org
buffer.  This fails whether or not an effort had already been set
for the task.

Using C-c C-x e in the original org buffer DOES work.

Not sure when this started, as I haven't played with efforts for
some months now.