I've just noticed that the Newsletter subscriptions tab has jumped up onto the same level as the View and Edit tabs when viewing a user profile, normally this would be under the Edit tab.
This is down to a typo in mailchimp_menu(), line 402:
'tab parent' => 'user/%/edit',
'tab_parent' => 'user/%/edit',
You can either edit the module or use hook_menu_alter() to fix, depending on how you feel about it.