i went to HP's website and re-downloaded the driver installed (which has a date from January 2008 on it) and re-installed that
and now i can scan from my c5180 again - so something's not right with this latest HP download - at least not for my model of all-in-one
and now i can scan from my c5180 again - so something's not right with this latest HP download - at least not for my model of all-in-one