We upgraded our cart to 4.11.1 and noticed immediately that order confirmation emails from the cart ceased, even though we received Sagepay payment confirmation emails fine.
After much testing, it appears that the problem is not related to the email address or methos of delivery, but linked to Sagepay, as all tests not using Sagepay worked fine. Only "live" tests with real payments via Sagepay failed to produce an order confirmation email.
Has anyone else found this, or had any similar problems with other payment gateways after upgrading to 4.11.1?