Firstly I'd like to say thanks for the plugin, it works better than anything else I have found.
Secondly, the system actually fails if you don't enter a URL to forward; I just got a blank page.
I went in and manually set the URL to forward to my homepage and then it started working, so it's not a major issue.
However the plugin says "URL to redirect
Note: If this option is left empty the plugin will redirect user to homepage."
It doesn't work quite like it says it does, so I thought you should know.
If it helps I'm using the latest suffusion theme as well.