I could provide a sample, but it isn't any different from other examples that work (other than the underlying data, which has many dependencies so I can't easily provide that).  Also, the same exact code works on some systems.

The only parameter being passed is the IQueryable. 

I guess I was hoping this had been seen and addressed elsewhere, so some direction to hunt in would be available.  Apparently it is rare enough that that isn't the case.  Thanks.

I'm experiencing this same issue, but only on one client's machine.  Works fine on my dev machine and other client machines with the same code and same IIS setup (As far as I can tell).  Would be very interested in any fixes or other information available.