I know that SDL's keyboard event generator has problems with unicode characters; it may be that there's no way to make it see that "a umlaut" key. However, if you can change the binding for the arrows to something else and then use the in-game key binder to see what (if any) key code it detects for the "a umlaut", i'll make the alt config for nordic users to download.

Dunno what Nokia is thinking releasing a mobile computer without directional arrows.

Edit: This was filed as Bug 6623. Out-of-the-box resolution will probably have to wait until the tilt-control version makes it to extras. I can release a version with two letters mapped to up and down as well as the arrows, but i'd rather focus on getting tilt control working and through testing. Soleil's workaround sounds usable to me.