I have a N810 with the latest Diablo OS2008. The Fn button is lighting up the keyboard, but I am unable to press any of the alternate buttons, such as numerics or symbols. When trying, it simply presses, for example, FN + Q = Q, not 1, which it should be.

Anyone else have this problem or know how to resolve without a reflash?

Thanks.

I had the same problem.
I am using the Hebrew package for an extra language.

Uninstalling it _and_ reinstalling the package fixed the problem for me, it might be due to using an international keyboard layout, try removing it and installing it again.