Today in the world literature, as at certain times in the past, are issues actively debated related to the interpretation and, more generally, to the foundations of quantum theory. At the same time these issues do not receive adequate treatment in the Russian-language physical publications. For this reason, Usp. Fiz. Nauk recently published a review by M B Menskii entitled ’Quantum mechanics: new experiments, new applications, new formulations of old problems’ (Usp. Fiz. Nauk 170 (6) 631 (2000) [Phys. Usp. 43 585 (2000)]). The editorial preface to this paper invited the readers to make their contributions to the discussion of the foundations of quantum theory. Some letters have been received and are presented below. Wishing to ensure free expression, we did not subject these letters to peer review, and take no responsibility for their content. We believe that such an approach is more or less justified by the current situation.