Just to confirm, I am getting this error and I too have site sculptor.
Have you tried uninstalling both CT and SS, and then just installing CT again? I think I am going to try this, but just a thought!
I'll let you know if it makes a difference. And another thought; during initial installation of CT, I had a message that said an newer version of something or other existed, but, CT's update to CS5 came a few days after SS was released. Don't know if that's useful...