Just here to report that the Zend Optimizer (the one mentioned in Help as "not been tested with P3. Please report any problems.") breaks the plugin. Upon scanning it only shows itself as the only plugin running. Sadly, I know of no way to disable it on a shared server (the
php_value zend_optimizer.optimization_level = 0 command added to .htaccess file unfortunately leads to Internal Server Error in my case and I can't disable it in any other way.