But trying to duplicate some of your FOUR_LEVEL mapping somehow doesn't work on my device. What "language / region" is your N900 configured for? In "Text Input" settings, what primary and secondary languages you have configured?

What flash image do you have on your device, the "Second Maemo 5 USA variant for Nokia N900" or the so-called "Second Maemo 5 Global release for Nokia N900"? I never understood the difference.

--denis

Edit 2/3/10: Matan pointed out bugs in the hildon-input-methoid framework that prevent FOUR_LEVEL mapping from working reliably. He has a patched version of that module that fixes the problem!!!