JBIDE-11232 cause the same problem occurs with Richfaces Project.
When you try to create the Richfaces Project from JBoss Central with EAP 6.0.0.ER3 (i.e. enterprise=true) you are offered a quick fix dialog with a lot of errors and none of them offers a fix. Most of the errors are of this sort:
Project build error: 'dependencies.dependency.version' for
com.sun.faces:jsf-impl:jar is missing.