Hi Ray,
I have exactly the same problem as "webassist285130", with Site Sculptor on Dreamweaver CS5 hanging and the Javascript-related error message popping up after a few minutes.
Site Sculptor is my first purchase from WebAssist and I did expect a well-tested, high-quality product from the company. I'm actually very disappointed about this issue which should have been resolved during testing, and why WebAssist would release a product that will not run "right off the bat" on CS5.
We don't want to have to create a remote/test server early in the site-building process and disable the preview feature as suggested just to make Site Sculptor work. I expect Site Sculptor to make it easy for me to do my work, not hinder it.
I appreciate your effort and feedback to assist us here, but please do try to resolve this issue ASAP with an update to Site Sculptor.
All the best,
Oscar