Post-installation PHP crash
A PHP segmentation violation is a PHP bug. You can not solve this at the PHP, or Drupal level, this needs a bug report for PHP itself, here.

Segmentation violation means that PHP somehow mismanaged it's memory, which is impossible to directly cause with PHP code, since pointers aren't available.

Notice though that there are two releases of 5.3 after the one you're running, upgrading should be your action, as a problem in method_exists() should have gotten a lot of attention, and is hopefully already fixed.