I have a VPS running with kloxo, with PHP updated to 5.3.8 (installed via yum install php53u) rather than the lxcenter's 5.2.x I had apache running under mpm_prefork, and mysql worked fine, but when I switched it to mpm_worker with PHP-ZTS, PHP continues to work properly, but not php-mysql. It works when switched back to mpm_prefork. PHP info displays '--without-mysql', php53u-mysql is installed, and mysql.so and mysqli.so are enabled. 'php -v' seems normal, no errors Will pay $5 for a quick fix, should be simple. PM me only if you know what to do.