Hi,

I'm trying to debug this error. There is no other info from the AppEngine side. Everything seems fine on the Drupal side.

Ideally I would like more info on the error from AppEngine, but no luck so far: http://stackoverflow.com/questions/17024701/intermittent-500-server-erro...

I've attached the traffic dump and a screenshot from Wireshark. I would really appreciate it if someone could look at it and help me find what's breaking AppEngine.

https://dl.dropboxusercontent.com/u/6618078/AppEngine%20OpenID%20error/d...

Thanks,
Graeme