Error after upgrade from 3.0.0-milestone2 to 3.0.0

I've got an unexpected error after uprgading my dependencies to CXF-3.0.0.
This is the exception i get:
com.sun.istack.SAXParseException2:
(uri:"http://wsmaggioliservice.informatica.maggioli.it/",
local:"richiesta"). Expected elements are <{}richiesta>

The request sent is the following one, which worked fine before:
<getClienteEnabled
xmlns="http://wsmaggioliservice.informatica.maggioli.it/">
<richiesta xmlns="">
...
</richiesta>
</getClienteEnabled>

(i omitted a few parts to keep things short)
it seems like the empty xmlns is ignored.

What should i do?