ApartmentRatings.com showing source code in home page

Is that like the Web 2.0 equivalent of your zipper being down?

I just discovered this problem myself. What do you think happened, and how can this be prevented? This reminded me of the Facebook source code leak.

Putting executable server-side code in your static document root and using a language that encourages it.

What language is that? Looks like c# or java?

JSP.