Same problem... fix doesn't work... I have ISPConfig installed on OpenSUSE 10.2 and am having the same issue. I made the change indicated above, made a change to a value of the website using the control panel, and even rebooted the entire server. I still have the same issue. I get the same error in my Apache error log as everyone else: "[error] an unknown filter was not added: PHP" Anyone else figured this out yet? Is this a problem only with OpenSUSE 10.2, or will I have similar issues with other distro's? Thanks.