I've multiple blogs hosted in an wpmu environment. In one of those blogs the piwik code isn't inserted. I've configured the same options as in any other blog. I already tried to deactivate all other plugins, but that didn't help. I also tried a different theme. The theme (ocular professor) calls wp_footer(). I don't know where to look for the error... :/ Maybe someone could give me a hint where I can start looking.