Q&A plugin login page not directing to proper URL

Hello WPMU Support,

I am testing a few things on the Q&A plugin and noticed that the 'Register/Login and Submit' button simply redirects to a broken page when nothing is entered as a response. This is somewhat misleading for the user, as they should really be alerted that they've left the form field empty, not met with a broken page.

Here is a screencast of what happens: http://screencast.com/t/zkRsGjTuVp

Is there a way to address this in the plugin?

Thanks,
Paul