When attempting to use eZOE, icons/images on the editor interface are not loading correctly. Using Firebug or the Chrome developer tools to inspect the traffic, there are at least two failed requests:

/var/ezwebin_site/cache/public/stylesheets/img/button_bg.png (404 Not Found)
/var/ezwebin_site/javascript/themes/ez/img/icons.png (404 Not Found)

This issue is present through a regular 4.x installation, or through a 5.x installation under the Symfony stack.

Steps to reproduce:
1. With eZOE enabled, create a new Article
2. Verify that the eZOE interface "works", but the buttons have no icons or images
3. Using Firebug or the Chrome developer tools, check that there are failed requests when loading the page, related to eZOE (404).