I have a DITA project that I have successfully published to XHTML within oXygen 22.1 using the supplied DITA-OT version.
Trouble is, in order to get the publish to be successful, I had to actually comment out the branch-filtering ANT task in the /frameworks/dita/DITA-OT3.x/plugins/org.dita.base/build_preprocess.xml file: