This site is running the latest development copy of Invision Community 4.5.0.
It automatically updates from our git repository as they are committed.
Note that this site is running in developer mode (IN_DEV) so it rebuilds all CSS and template data on each click. This means the site will run much slower than a real, production install will run. Please do not judge 4.5.0's speed based on invisionalpha.com 🙂