I've got that error after upgrading to 3.0. It shows almost everywhere, and i cant manage anything anymore.
Here is my error log :
[Sun Feb 02 23:42:35 2014] [error] mod_fcgid: process /www/php5.fcgi(778908) exit(communication error), get unexpected signal 11
[Sun Feb 02 23:42:35 2014] [error] [client 94.26.51.195] File does not exist: /site/public_html/openx/500.shtml, referer: http://[website]/www/admin/affiliate-zones.php
] [notice] EACCELERATOR(778908): PHP crashed on opline 59 of _addLimitation() at /site/public_html/openx/lib/max/SqlBuilder.php:36629336
Thanks!