Formal charges of heresy, although less common than in the medieval period, have not died out. Within the Christian churches there continued to be formal charges of heresy as well as less formal censures such as dismissal. The key issues in the Anglican and non-conformist churches have been modern Biblical criticism; the nature of God; and the acceptability of gay clergy. The Catholic Church, through the Congregation for the Doctrine of the Faith, appears to be particularly concerned with academic theology.