Issue in APC

Site seems to function without issues, but our error logs just fill with the following PHP errors after enabling APC.

PHP Notice: include() [function.include]: 1. h->opened_path=[null] h-

Windows Server 2008 R2
Apache 2.2
PHP 5.2.17 THREAD-SAFE VC6

For this just changed the error_reporting variable in php.ini to -

error_reporting = E_ALL & ~E_DEPRECATED & ~E_NOTICE