external links to file paths don't work
links in the form file:// as external links in the documents module don't work, the validation tries to prevent file:// links, but even if that is fixed as the links open through a javascript based process the file links are blocked by the browser sandboxing of javascript. Clearly external file links are only going to work when the path can be resolved, so probably on a LAN, but this is a customer requirement from time to time.