samba - Aug 2013 - smb_raw_open_recv error on Windows 2012 R2 Preview

Hello,

I am using Samba 4.0.8 on a Red Hat 5.2 x64 machine. I am getting the
NT_STATUS_INVALID_PARAMETER error string when running smb_raw_open_recv for a
Windows 2012 R2 Preview remote host.
I was unable to reproduce the error on other Windows platforms (works fine for
Windows 2012 and other older versions).
The remote host has SMBv1, SMBv2 and SMBv3 enabled. If I disable SMBv1 I
can't even connect (getting error NT_STATUS_CONNECTION_RESET). If I enable
just SMBv1 I get the NT_STATUS_INVALID_PARAMETER error, regardless of whether
SMBv2 and SMBv3 are enabled or disabled.

Any help is highly appreciated.

Thank you,
Mihai