[errai-users] Sending a Date object?

Does anyone know if it's not possible to send a Date object to the client over RPC (possibly at all)? I was doing a simple "return new Date();" in an RPC endpoint and my client always seemed to get null back. As soon as I changed it to a String, it worked fine, but I seem to always get a null for a Date, even in a POJO. I can send them just fine to the server, oddly though.