I downloaded and loaded up Simple Facebook Connect (http://wordpress.org/extend/plugins/simple-facebook-connect/), so I can have commenters link to their facebook profile.
I'm using the thesis theme. And I got the button to load on the comment page. But when I click on the Facebook connect page I get the following:
An error occurred with Tan Pham. Please try again later.
API Error Code: 100
API Error Description: Invalid parameter
Error Message: next is not owned by the application.
Tan Pham is the name of my Facebook app. Any suggestions on how to fix this?