I did some simple work doing some assignment sheets for my students. It was an example of how to do a plan, section, elevation and axon. Didn't have any problems with layout, drawing, layers or anything else.
Looks like Snow Leopard also corrects a problem with Spaces. I assign VectorWorks to always be in Space 2. When I change to VectorWorks through the Dock icon or through the Command-Tab keys, it brings VectorWorks up in whatever space I am in, but not the window of the project which remains in Space 2. Snow Leopard allows it to work properly.
Other than that, nothing to report.