The plugin org.jboss.ide.eclipse.ejb3.wizards.ui declare a dependency on org.eclipse.jdt.source. You can see that in the Manifest file:
http://fisheye.labs.jboss.com/viewrep/JBoss/jbosside/ejb3/plugins/org.jboss.ide.eclipse.ejb3.wizards.ui/META-INF/MANIFEST.MF?r=1.3

Unless I'm mistaken, this dependency is not needed (why would the wizard have a dependency on JDT source code ???)

It's innocuous, but this causes an error to appear in Eclipse error log.

Also, for us at http://www.easyeclipse.org, it means that we have to patch the manifest when we build it. It's small, but useless