Vista - net.message addressing support

I have a WCF service which uses abstract addressing.
when using NetTcpBinding i can create a channel such as

ChannelFactory<IFoo>(binding, new EndpointAddress("uri://myaddress"),
"net.tcp://localhost:1111");

so that a message is sent using the Via parameter to an actuall endpoint,
but the message's To header will be "uri://myaddress".

When i try to do the same with net.msmq, i was suprised to realize the
transport uses the EndpointAddress parameter _rather_ then the Via, so i get
an exception.

Is this by design?