> What version of emacs are you using?  I know that there was a problem in
> the development version of emacs early in July that caused this type of
> problem.  I am not sure if it has been fixed -- I've kept to a version
> from June for the time being.

I'm using 24.4.5 on one machine, and 24.5.4 on another (both on OS X),
and having the problem on both machines (and on a third, which is also
running some version of 24).

Best,

Toby