Keyboards and how they seem to work with Linux...
I have noticed the same thing. I am doing two things to find out what the issue may be. I am trying a couple of keyboards. It's still hardware with Linux I think, even here. So far I have tried a Knoppix, Ubuntu and Gentoo disk and I am getting the same keyboard action. I am going to try a couple of keyboards to make sure whether it's a "hard" or "soft" problem.
Keyboard mappings, language packs etc. are one of the murky areas still for computers.