Genesis Theme trouble:

Hi reddit,

I'm currently working on my website when all of the sudden this showed up:

Notice: Undefined property: stdClass::$subject in genesis_preprocess_block() (line 122 of /html/drupal/sites/all/themes/genesis/genesis/template.php).

How come and how to stop that? A minute before it all seemed okay. If you need to see the site it happens on: http://drupal.p131548.webspaceconfig.de/node/30 but why doesn't it show up on all sites?

Can anyone help me out?