I know it is not yet officially supported, but APC was giving me serious problems. I replaced it with Zend Opcode cache following an online guide. It works very well, in fact better than APC. The major problem I am having is that I can't clear the cache from any of the opcache guis I have tried. They all cause segfault 11. I have to restart apache to get things working again. I was wondering if anyone is using this setup. I'm using php 5 handler as DSO. Suexec and Ruid 2 on I was wondering if anyone has run into this? Thanks.