PHP APC flakes out / crash after awhile. PHP 5.3.8

Just throwing this out there. Anyone using PHP APC notice it is kinda flaky?
I haven't messed with it too much but is seems like if I have APC turned on eventually the php-fpm will flake out and crash. The crash will require the service to be restarted.

I don't think I modified the stock /etc/php.d/apc.ini

Any thoughts