SP 2.5, using ECP

[Steven Carmody]

As part of a larger project, I've started trying to use ECP support in 
the newest SP 2.5 alpha.

So far, all I've done at the SP side is add ECP="true" to my SAML2 
SessionInitiator.

I've downloaded Scott Koranda's ecp.sh script, and run it against my 
newly installed SP.

shibd crashes, every time I run that script; its repeatable.

Should I have made other config changes to the SP ?