Thanks for your reply. $fpath told the tale. It was still running 4.3.9. I
had just created a new window within gnu screen and assumed it was using
5.0.0. Closing my terminal and restarting it fixed it. Thanks!

On Fri, Aug 3, 2012 at 1:26 AM, Bart Schaefer <schaefer@brasslantern.com>wrote:

> On Thu, Aug 2, 2012 at 6:28 PM, Kelly Davis <kldavis4@gmail.com> wrote:
> >
> > I updated to 5.0.0 by installing 5.0.0-devel using macports. I am still
> > getting the error shown below:
> >
> > _arguments:comparguments:303: invalid argument: [--cl]:arg:
>
> That's somewhat odd, because there is no call to comparguments on line
> 303 of the _arguments function in 5.0.0.  Can you check you $fpath to
> see if there might still be an old function definition being found?
>