FOSS gamedev and creative worlds

Seed, server name, world name, pseudo, password, etc. etc.
I'm under Darwin 13.1.0. I'm under OS X Mavericks 10.9.1, which is fundamentally Darwin 13.1.10 (which is fundamentally FreeBSD, which is fundamentally BSD, etc.).
I use Minetest 0.4.9 with binaries here : www.github.com/mdoege/minetest/releases/tag/20140423

This problem has already been reported here (for French keyboards): viewtopic.php?f=3&t=9023&start=50

German and English keyboards work correctly, so I don't know how to help you there. It seems to be a problem with Irrlicht on OS X, not Minetest's code.