Yes… you’re right, we’re waiting for the other shoe to drop…
There it is: As they have rolled out these great new features, they have reset some values to default, including your preference for secure browsing. If you had previously selected “use secure browsing (https) whenever possible” you may find that has been turned off, leaving your connection unsecure (http).
Just click “Account->Account Settings->Security” and then select the value you prefer.
Have you noticed anything else behaving unexpectedly?