The property documented "cargo.container.<containerName>.config.hint" in the maven documentation is refused by CARGO 0.6 (it used to work in CARGO 0.5).
If this property is specified in the project.properties, the cargo:start goal will fail with :
Unknown configuration type  for container [Oc4j].
(in the case of an Oc4j container.
The new property to indicate the configuration type is "cargo.container.<containerName>.config.type" and this should be specified in the maven support page.