Since only recently the plugin is acting strange: only when I put in the redirect URL with a trailing slash (so: /source/ -> http://www.mysite.com/destination) in my browser it works. If I just do /source it doesn't, I get a 404 page from WordPress. If i try to remove the trailing slash in the config it just re-appears again after saving the changes.
This sure was not the behavior before. What happened and how to solve?