The release 2.11 binary distribution contains a file apache-cxf-2.1.1/lib/WHICH_JARS that states "This directory includes the CXF jar, the CXF manifest jar, the required dependencies"
Under JAX-WS support, it lists
For JAX-WS support:
- geronimo-ws-metadata.jar 
- jaxws-api.jar 
however, the required depenency jaxws-api.jar is not included in the apache-cxf-2.1.1/lib folder of the distribution.