[eluser]kurucu[/eluser]
I published an application to a live server today and none of my stylesheets and javascript worked!
The problem was simple, in the end, and was that my live server has SuPHP installed on it. I wrapped the file-modification functions in the asset library with chmod 775 and chmod 755 for the 'compressed' directory. I did note that instead of the usual Apache complaint, CI also handled the error as a 404 (if I navigated to the CSS file) which would be great for the end-user but left me baffled!
This is here for anyone banging their heads on their desks, as an idea of what might cause the problem. I will suggest some ideas/code to the project author to help fix the problem.