-register JBossAS 6 in the IDE
-create new dynamic web module (version 3.0)
-open new web service wizard
-set the type to top down, use some arbitrary WSDL, press next
-see that JAX-WS spec version is set to 2.0
-finish the wizard
-open generated *Service.java file

=> generated file contains among others following constructor:

public EchoWSService(WebServiceFeature ... features)

problem is that the WebServiceFeature class has been introduced in JAX-WS 2.1 hence the mismatch of the "user" selected JAX-WS version in the wizard - 2.0 - and the version of sources generated by wsconsume - they're actually of version 2.2