I don't see that I submitted this one yet...In Pubsub XEP 0060, "7.2.3.6 Item Deletion Not Supported", reference is made to the feature "delete-nodes", but it presumably should be something like "delete-items", though the latter would first need to be listed elsewhere in the document. And under the "8.4 Delete Node" section, there is no reference to a potential error of feature "delete-nodes", as I imagine there should...
Brett
