rolled back app_controller.php, cakephp still whitescreening

Thanks in advance. I'm confused. I made changes to app_controller.php in CakePHP and then rolled it back to what I know is a good copy afte开发者_开发知识库r whitescreening. I am still getting the white screen of death even so. Can't figure out what to look for here...

I checked the logs and there is no useful info.

Kris

Check your config/core.php file. Set the debug value back to 1 in order to display your errors. White screens usually happen to prevent your users from seeing errors.

If this is already on a live server, deleting cache can also be helpful. Visit your app/tmp folder and clean it out. Refresh.