ExpressJS/Node: 404 images

[Greta]

I've set up a basic node/express server which serves public static
javascript and css files fine, but returns a 404 error when attempting
to serve images.

The strangest part is that everything works fine when run locally.
When run on my remote server (linode), the image problem arrises.

Here's my StackOverflow link where you can see the code:
http://stackoverflow.com/questions/10416102/expressjs-node-404-images