I've installed on many servers from after reporting this and all server has same issue even though all was correct and mod_security disabled. From almost all servers the error is not so much related to mod_security but more of a config file from what I have seen in the server error logs. Doing the install and bypassing this error makes this file for you and works just fine no issues. The error is false and the real error is related to a config file that is 404 to my guess because it's not installed. After installing this file is created from what I can see.
This is the case in all servers that I have installed on and may not be the case for you hopefully piwik will see this and look into this issue and maybe fix this.