WS-RX: Anonymous client that offers a sequenceId should not be rejected (sequenceId should be disregarded instead)

Hi,
I had a big fight when I tried to get JBossWS work with WSF/PHP (using WS-RX). Everything was working fine when using the Java client but for no evident reason, it was failing when I used WSF as client.
After hours and hours of investigation, I figured out that it was at conversation initiation that the process was failing. The reason is that the client is registering under the "http://www.w3.org/2005/08/addressing/anonymous" address and is proposing a sequence Id under the CreateSequence node:
<wsrm:CreateSequence>
<wsrm:AcksTo>
<wsa:Address xmlns:wsa='http://www.w3.org/2005/08/addressing'>http://www.w3.org/2005/08/addressing/anonymous</wsa:Address>
</wsrm:AcksTo>
<wsrm:Offer>
<wsrm:Identifier xmlns:wsrm='http://docs.oasis-open.org/ws-rx/wsrm/200702'>57540fe2-c21b-1dd1-3acc-001143a00b7a</wsrm:Identifier>
<wsrm:Endpoint xmlns:wsrm='http://docs.oasis-open.org/ws-rx/wsrm/200702'/>
</wsrm:Offer>
</wsrm:CreateSequence>

From what I read in Oasis specification, a server should not accept the proposed identifier of an anonymous client but I do not see that it MUST reject any client that provides such a combination.
What I would suggest is that rather than rejecting the conversation, the server should only disregard the Offer/Identifier value and behave as if no sequence id had been provided.

I tried to find out where to do this in JBossWS with no luck.