Hello, I installed Zend optimizer sometime back, but never bothered to check whether it's working or not. I was looking for something else in my httpd error log, when I came across this . Could anybody shed light on the problem? Failed loading /usr/local/Zend/lib/ZendOptimizer.so: /usr/local/Zend/lib/ZendOp timizer.so: undefined symbol: zend_get_ini_entry To get info on my system configuration please click on http://www.esaravana.com/phpstuff.php Cheers! Sundar