Text & URL fields not supporting 'http://'

I am using Visual Form Builder for a submission form at http://carshowz.com/add-car-shows/

I have a field for the user to enter a link (http://www.example.com).

If the field does indeed have http:// in it when the user hits submit, the page reloads, the form is shown again, no error message is given, and the event is not created/saved.

If the field does not have http:// in it, it works perfectly fine.

I can do http:www.example.com, http:/www.example.com, but, NOT http://www.example.com

This of course is a problem when the URL validation is enabled on the Text field type or I am using the URL field type.

As a work around, I removed URL validation on a text field.

This is a recent problem. The site was migrated to a new server with a fresh install of WordPress and Visual Form Builder.

Thanks in advance.

http://wordpress.org/plugins/visual-form-builder/