I installed this on a multisite network and the demo code isn't working. (I added it to a custom site plugin I'm using instead of functions.php. I tried adding it to a theme-specific function.php instead, but that didn't help.)
(The plugin is listed as an active plugin on the network plugins listing, but it's not showing up on an individual site's plugin listing. I can deactivate on the network, then it shows up on the individual site's plugin listing and I can activate it there.)
I'm getting errors in the admin area ("Invalid argument supplied for foreach() in") multiple times for lines 516 and 63 in meta-box/inc/classes/meta-box.php (in that order, over and over).
foreach ( $meta_box['fields'] as &$field )
foreach ( $this->fields as $field )
Does this plugin work with multisite? How do I eliminate those errors?