Can't update plugins - checkbox not available

I migrated my install from one domain to another. At first, all my plugins were updateable.

Now, even when I log in to post this support question, under list of plugins, none of my plugins on the new domain are listed.

Also, when I go to update core plugins, the plugins old version and latest version available are listed, but there's no checkbox to select plugins for an update.

WPMU Dev Dashboard is listed as one of the installed plugins, doesn't need an update, but I don't see it in my install anymore.

Any ideas?