Shibboleth.sso not replying on SP in 2.3.1

[Peter Schober]

* Ken Demarest <ken.demarest at gmail.com> [2012-10-05 18:24]:
> it appears that mod_shib is not intercepting the url, and I'm passed
> through to my (Rails Passenger) application, which of course
> responds that it can't find the file.

Then stop your mod_rails from also eating ^/Shibboleth.sso

With some configurations in the past I had to set someting like
<Location "/Shibboleth.sso">
  SetHandler shib-handler
</Location>
in order to reclaim the request uri from some other handler possibly
set to <Location "/"> SetHandler foobar etc.
-peter