I'm using 2008 R2 and using Visual Studio 2008 as in IDE.

One thing that occurs to me, is it possible to upload rdl's as attachments? I don't see it in the allowed extension types. I can't send out the actual report (politically sensitive and all that) but I could trivially knock up a dummy example that exhibits the problem.

On the allowing nulls etc. I've set them up apropriately for the parms involved. The dropdowns all allow nulls and the freetexts all allow blank.

The fake parms a last ditch option which I might consider but it's awfully fudgy.