https://bugs.winehq.org/show_bug.cgi?id=57296
--- Comment #20 from garrett m garrettm4@protonmail.com --- Yes, but that "one" pixel enlargement in 9.20 causes the radio buttons look like "plus signs" rather than circles. There is a delicate balance in the pixel layout / coloring needed for them to look circular at the new size. Its much like mouse cursors: One can't simply enlarge everything by one pixel and have it look the same, integer amounts sure, but arbitrary scaling of UI elements is tricky -- as we can see here with classic radio buttons.
Anyways, I think the primary issue comes from the "center dot" being made too large. This then causes the "outer ring" of the button to be expanded in a way that causes the overall button to look like a + and, hence, distorted.