getting an error with a post to SAML2/Redirect

[Jim Fox]

We have an SP that POSTs a request to SAML2/Redirect/SSO.

shib 3.3.0 is reporting the error:

ERROR [org.opensaml.profile.action.impl.DecodeMessage:73] - Profile Action DecodeMessage: Unable to decode incoming request
org.opensaml.messaging.decoder.MessageDecodingException: This message decoder only supports the HTTP GET method
         at org.opensaml.saml.saml2.binding.decoding.impl.HTTPRedirectDeflateDecoder.doDecode(HTTPRedirectDeflateDecoder.java:89)


The same request works fine on our 3.2.1 installation.

Might it be the order of beans in saml-binding-config.xml?

Jim