When I run the Magento Compiler process it completes fine and then it's enabled. Everything is fine on the frontend until I add something to the basket, it goes to a white/blank screen, same for the basket page and checkout page.
I've tried uncommenting the ini_set('display_errors', 1); line in the index.php file but still nothing is returned. I've also tried showing errors via the .htaccess file without success.
The website's php limit is 256M, so that shouldn't be an issue because the website is empty at the moment.
Really don't know what to try next to debug this? As it just returns nothing and the error logs are empty (CONFUSED!). I've disabled and removed all the 3rd party plug-ins I've used, that appears to have no effect. And I've successfully used those plug-ins I have on other sites with compilation without any issues.
Any help or pointers would be much appreciated! I'm running Magento CE 1.6.0
I finally worked out what was causing the problem!
I've you go to Admin > System > Configuration > Customers > Persistent Shopping Cart
And then disable it, then the checkout whitescreen error goes away!