Logout Redirect - 500 Server Error

I installed this plugin a couple of days ago and I just noticed an issue. When I am logged in on and am reading another users blog, I click logout and I receive a 500 error. If I refresh the page, the logout works fine. It will load up a page that says are you sure you want to logout and then redirects me back to the homepage.

This only happens when I am browsing other users blogs though. If I log out from the admin panel I do not get this error.

Any ideas?