PHP 5.5 and OpCache (no replies)

Recently, I upgraded my Debian server to Wheezy and now running PHP 5.5 with Zend OpCache.

After the upgrade Piwik would just show a blank screen...no errors in logs to view.

I ended up troubleshooting the problem back to OpCache by disabling it. However, I would like this running for other vhosts on the VPS.

I then tried to use OpCache blacklist to disable OpCache on the Piwik installation only...but it didn't work.

The only way I can get Piwik to work is by disabling completely.

Any ideas how to simultaneously use Piwik and OpCache? Is anyone else having this problem?

Also, important to note I'm running Nginx with PHP-FPM.

Thanks for your help.