SAML1 CheckRequestVersionHandler ClassCastException ?

[Tom Zeller]

When wiring an inbound message handler chain, the SAML1
CheckRequestVersionHandler throws a ClassCastException
"net.shibboleth.idp.saml.impl.profile.IdPInitatedSSORequest cannot be
cast to org.opensaml.saml.saml1.core.RequestAbstractType".

The message decoder is
net.shibboleth.idp.saml.impl.profile.saml1.IdPInitiatedSSORequestMessageDecoder.

I will take a look, but I am confused. Maybe it will be obvious to someone else.

Thanks.