I've setup and am using Simplr Registration Form on my website and overall am rather pleased with it! I've noticed one bug, though:
When I (or anyone else) tries to use the registration form to sign-up a new account and unknowingly use an email address that already has an account attached to it, the form redirects them to a "page not found" page after submitting the form.
Is there a way to instead have the form redirect to a page -- either defined by me, the admin, or generated by the plugin itself -- that clarifies what's wrong (ie. that they can't re-use that email address)?