Mutex check failed

Some of the operations FireStats performs need to be synchronized to protect data integrity.
FireStats used the flock PHP function to perform this operation, but it does not work correctly on some servers.
If your Mutex test fails, you can either try to upgrade your PHP, or tell FireStats not to synchronize those operations.
Note: if the error you are seeing is "Managed to lock file, but should have failed for the test to succeed", try to ignore it and see if FireStats works. if you see problems disable the mutex.

This is generally not recommended, but may be the only option for some users.

To disable synchronization, you need to uncomment the line

define('DISABLE_MUTEX',true);

in conf.php in the FireStats root directory.

Note: By default, FireStats comes with the file sample-conf.php, and you have to copy it to conf.php before uncommenting the line in conf.php.