Having some serious troubles with the new updates. I wanted to switch over to APC & get everything squared away with the new version of LiteSpeed so we could see what kind of performance gains are in store. Unfortunately, we can't get 503 errors to stop running rampant after enabling APC. We have tried all sorts of APC settings, LiteSpeed settings, disabling other PHP modules, etc. Nothing has worked. If APC is enabled, clients see 503 errors. This happens on heavily loaded systems as well as lightly loaded systems. After 1-2 page requests on a site, 90% of the page requests from that point forth are 503 errors. I've tried -huge- memory settings for APC and for LSPHP. I simply can't get it to work, no matter the configuration I use. I've had to disable all opcode caching for now because of the 503 errors. Is there something I'm missing? Here is a link to our LiteSpeed configuration (this is for PHP 5.2.17, but this same error occurs with 5.3.18 on all three of the systems we've tried it on): https://dl.dropbox.com/u/158959/litespeed1.png PHPInfo is at the link below, but APC is disabled for now for obvious reasons. http://atlasmail.theservercompany.com/~atlas/phpinfo.php The 503 errors show "Connection reset by peer!" when attempting to connect to uds://...lsphp52 , nothing of any substance. There is plenty of available RAM on the system when the 503 errors occur (>10GB), and I've tried huge settings (~16GB) for max RAM usage by LSPHP with no luck. Any tips?