Same Error for me
Yes I have exactly the same error:
-pure virtual function call
My links were and still are set to Document - i have also tried remove and re-install of the extension ( 2.0.5 & CS4 ) and also on a new table and DB... The extension has been working great up until now.... I have a proect due in the next few days - this has been a big set back - the quicker the support response the better.