I can also confirm geobueck's report: I have the same effect with evopedia 0.3.2-maemo3 using a german wikipedia dump (wikipedia_de_2010-03-26), both on my newly arrived N900 at PR1.2 and in scratchbox: Only some keypresses get accepted at all, others (most) just get rejected.
Downgrading evopedia to 0.2.99+3.0rc3-maemo1 fixed the problem for me.