Quick query from 3261 section 12.2 "Requests within a Dialog"..<<SNIP>>Requests 
within a dialog MAY contain Record-Route and Contact header   fields.  However, 
these requests do not cause the dialog's route set   to be modified, although 
they may modify the remote target URI.   Specifically, requests that are not 
target refresh requests do not   modify the dialog's remote target URI, and 
requests that are target   refresh requests do.<<END>>Since the routeset is 
already established, why would the Record-Route headers be allowed in new 
requests?-will
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