Ok, Thanks!

>>uhhh, I can't see anything about this in http://download.microsoft.com/download/2/f/6/2f6db93f-c0e7-4cf3-82bf-cec0ecef5c84/SP1Readme.htm
>
> SQL - UPDATE and DELETE are not Rushmore-optimized if target table has table buffered changes.
>
>seems to be the item...
>
>HTH
>
>thomas