Linq To AX = buggy

Hi,

since no reply has been made yet to my question (community.dynamics.com/.../111174.aspx), can anyone at least tell me where can I post my questions/address issues which will be at least seen by Microsoft experts in this area (LinqToAX)?

I ask this since Linq To AX seems to be very buggy. Even very simple queries cause this awkward NullReferenceException. For example:

new QueryCollection<HcmPosition>(provider).Where(p => p.RecId == 0).ToList();

I kind of have a feeling that the AX expression visitor has a problem with the primitive types?!

Edin