Exception when launching the app from changeset 9714

Dec 16, 2007 at 11:35 PM
I was previously using the release version But there is a bug in this version: after any postback, the FbHyperlinks will redirect the user on the add.php page. This bug seems to be fixed in changeset 9714 so I moved to this version, but now I'm having a NullReferenceException in FacebookIFrameSession.cs right after launching the website. It's happening line 83 at :

if (_referrer == null) {
_referrer = request.UrlReferrer.AbsoluteUri;

request.UrlReferrer is null, so I get an exception.
Is there any fix for that?