Hmm it seems to disappeared… so I am closing this.
Hi Sinkadus,
you found a minor bug! I’ll have this fixed for the next release.
This message is ONLY appearing for you because you have error reporting enabled on your site. Especially since this is a live site, I recommend disabling error reporting as it can be abused to provide information about your server.
In your WordPress installation folder, there is a file called wp-config.php. Edit this file and change define( 'WP_DEBUG', true ); to define( 'WP_DEBUG', false ); (this line will be near the bottom of the file).
Now to fix this issue for you – I *think* that if you go to the HD Quiz -> About / Options page and press “save” that will set the variable that the PHP notice you are seeing is referring to and flush out that notice.
Please let me know if you need further assistance
Ah, okay. Thanks for pointing this out. I will change this to false.