Occasionally, my cache becomes corrupted and some pages will cause PHP to crash with the following message in the log file
EACCELERATOR: PHP crashed on opline 5 of wp_kses() at /home/ ... /wp-includes/kses.php:515
While other pages that also use that exact same file will work fine.
Clearing the cache resets the problem for a while, but it seems to come back.
I've added the following configuration line to combat the problem:
eaccelerator.filter = "!*kses.php"
Googling on eaccelerator and kses shows this is not an isolated problem.
I'm running PHP 5.1.2.