"LoginContext key cookie was not present in request" with particular SP

[Peter Schober]

* Ian Rifkin <irifkin at brandeis.edu> [2013-06-27 05:15]:
> I will verify with the vendor what they put in as the endpoint. Can I check
> that on my end? Using firebug and going to their URL and watching where I'm
> sent, it looks like I'm ending up going to /idp/profile/Shibboleth/SSO on
> my Shibboleth IdP server. Using a different SP (that works) it seems to go
> to /idp/profile/SAML2/Redirect/SSO. Not sure if that's relevant or not.

"Error decoding Shibboleth SSO request" and the profile URL above
means they are /not/ using SAML2 like they claimed, but the lagacy
"Shibboleth profile" (plus extensions) of SAML1.1,
-peter