I noticed this when I first started using Vasari. I could see the teapot icon in the view control control bar, but it seemed to be greyed out, so I assumed I couldn’t render and the functionality was disabled.
The reason for this is because by default when you start a new project in Vasari you start with create mass mode enabled. Its not until you either finish mass or double click the canvas that you come out of the create/edit mode. Once you do this, your teapoint icon will display and you can then click this to open up the render dialogue box; you will then be able to happily render your scene.
Mind you this assumes you have the material library for 2011 installed.