The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
The feature for not removing empty reclaim orders didn't make it in. The implementation of Strogo wasn't fool proof, we couldn't include that. We're working on an alternative, but that didn't make the deadline.
@magge
There was a patch which integrated ACS
Better to call it deprecated / incompatible. It wasn't fully integrated.