I recently upgraded to 3.5.1, as well as upgraded multisite plugins and something odd has happened to the network admin.
Let's say i'm logged in as a Super Admin on site titled 'Foo bar'. When I hover over 'My Sites' in the admin bar, each if the site titles in the drop-down has been replaced by 'Foo bar'. Likewise, when clicking on My Sites, I just see the current site 'Foo bar' listed repeatedly on the page, instead of the list of sites titles on the network.
If I go to /wp-admin/network/sites.php and hover over 'Dashboard' next to each site title, I see that the URL goes to the /wp-admin instead of /foobar/admin.
There are only 2 plugins that are network activated (the others are activated on the sub-sites). I've tried disabling both of these to no effect.
Can anyone explain what might be happening here?