My FogBugz installation is functioning correctly, but images aren't showing up.  

If I hit the URL of a specific image (e.g., http://localhost/FogBugz/images/add.png), the browser is just returning the URL string instead of the image.  If I type the URL of an image that I *know* doesn't exist, I get a 404 error as expected.

Note: I'm running FogBugz on a Win7 development machine running IIS 7.5.