Eclipse faq: view-handler references to com.sun.facelets.faceletviewhandler that does not implement interface javax.faces.application.viewhandler

On a jsf 2.0 project, using eclipse, I got this warning on the faces-config.xml file at:
<view-handler>com.sun.facelets.FaceletViewHandler</view-handler>

The message was:

view-handler references to "com.sun.facelets.FaceletViewHandler" that does not implement interface javax.faces.application.ViewHandler


Solution
Problem solved configuring "roject faces" JPA.
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