Here I will collect some points where I'm critical of some aspects of relativistic mainstream physics. To clarify: special as well as general relativity have been, without any doubt, great advances of physics in comparison with pre-relativistic theories. And even if my own ether theory of gravity will be successful, this status will not be questioned: Instead, the Einstein equations of General Relativity would remain the natural limit \(\Xi,\Upsilon\to 0\) of my own theory. This would define an ether interpretation of the Einstein equations of General Relativity.

- A common misunderstanding about the "twin paradox", namely that it is somehow the acceleration which matters, is discussed.
- The way inflation theory is presented in popular (and not only popular) descriptions is a horrible misrepresentation, starting with the choice of the name "inflation", which, wrongly, suggests that it means a high expansion rate, instead of an increasing one.
- Hawking radiation is a prediction which fails because of the trans-Planckian problem: The derivation has to assume the applicability of the semiclassical approximation of quantum gravity, but uses this approximation in a domain there it makes no sense at all to assume that it holds.
- What is the problem with quantization of gravity? The main problem appears to be the insistence that quantum gravity has to be, like classical GR, a background-independent theory. Without this requirement, GR quantization becomes much more unproblematic.