I implemented the open ID provider from DotNetOpenAuth into my application. It's implemented almost exactly how they did it in their sample open ID provider.
When I try to log into SO using my open ID though, SO doesn't let me and tells me this:
Redirects on POST requests that are to untrusted servers is not supported.
Not sure how to get this fixed. Basically there is a button that the user can choose "Continue" to authorize the open id request or "Cancel".
I can post the code but it's kind of long. I'm using DotNetOpenAuth 220.127.116.1162, do I need to update?