When loading unified.target as a target platform in my Eclipse PDE I get these errors:

Required feature could not be found: org.drools.eclipse.feature
Required feature could not be found: org.drools.eclipse.task.feature
Required feature could not be found: org.guvnor.tools.feature
Required feature could not be found: org.mozilla.xpcom.feature
Required feature could not be found: org.mozilla.xulrunner.feature

Commenting/removing the <includeBundles> block at the bottom of the file allows the target platform to load correctly and with no errors.