Hopefully someone can give some light as to why this might be happening, and out of the blue too when before the addon functioned perfectly. Basically it's a simple addon that adds a NavTab for a custom page / template I make. That page has a sidebar with links to other pages/templates the addon serves. What's odd though, is for one of the templates/pages, the link is 'site.com/servers/css' and this will result in a 404 error, however, I have other pages, such as 'site.com/servers/tf2' and these function perfectly fine. If I add an end slash to the css one, site.com/servers/css/ it works, but why are all the other pages working with no end slash? I looked up my error logs and found this: I can't figure out why that link would actually be trying to open a folder/file relative to the site's doc root... especially when its controller matches all the others Anyone have any ideas why this is happening all of the sudden?