Soap Server and Client were breaking binary files during transfer due to invalid Mime Message Parser. Now is it working fine with no errors, but the message parser is about to be rewritten into a better form.
The inner storage is now the only possible way to handle attachments and hydrate responses by using ClassMap at the same time. To get the response objects from ClassMap, use SoapResponse->getResponseObject() method
Petr Bechyně
Francis Besset