Hey Dak,

You might check your PHP settings on error reporting and set it to show all errors - maybe that will show something up. If the file is not found, PHP should print an error message about it, if the code has something mucked up, PHP again should print an error message about it, that is true in both cases, unless error reporting has been suppressed in the PHP configuration.

Alternately you can also specify the level of reporting several other ways too:

PHP: error_reporting - Manual for more information on this....

Just seems that if the code is wrong, PHP would be spitting out errors on it, not just showing blank pages.