I'm seeing the same problem with the new version. 184.108.40.206.
WordPress version: 3.4.1 (multisite)
WordPress SEO version: 220.127.116.11
I did this: updated the plugin - network activated the plugin
I expected the plugin to do this: work as usual
Instead it did this: broke admin access for all newly created sites on the network - we're also seeing some other weirdness that may be related wpconfig.php. Now getting errors with W3 Total Cache...
this line disappeared FROM wp-config.php???
define('WP_CACHE', true); // Added by W3 Total Cache
I network deactivated 18.104.22.168 and the newly created sites' dashboards are functioning normally.