Something has happened to the site i´m working with. All of a sudden an Ajax function stopped working. The request says '404 - file not found' even though the file is in file tree. If I try to access an .html file I get access to it though. The site works as it should otherwise.
The last thing that I changed on the site was that I installed and activated the W3 Total Cache plugin. I have since then uninstalled it and removed all the files and the additions by W3TC to the .htaccess file and the wp-config.php file.
Any ideas what I should try next?