Noticed strange thing - my "blue_arrow+ tap = right click, shift + tap = middle click" is actually working in gcompris "footbal" (where you have to double click right to shot ball into right corner, double left to left corner, etc), but in a strange way. I need to repeatedly "bash" both blue_arrow and tapping for getting right click.

Also, in falling letters, it's not only problem with words containing double letters - if we play variant where single letters are failing from sky, everything works OK, *unless* there are failing 2 same letters in row. For example, for two failing "O"s, only first get registered.

But, If if purposely hit wrong letter between two "O"s, I can clear them both. Of course, it doesn't work with words, as hitting wrong one reset word progress.

Summing it up, it seems to me, that keys become "sticky" upon pressing - when we hit "O", for example, it seems to me, that gCompris thinks "O"s got pressed and is *still pressed down*, without being released,

I think that it applies to all keys, which aqlso explains my problems with <any_key>+ tap for right and middle click. In most games, it don't matter, but in failing letters/words, it spoils results.
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Keep in mind that it is just my asumption, as I have no idea how to confirm my suspicions. Also, while writing text in gCompris's simple text editor, no such "sticky keys" (or any other problem with letters) is present. But, it may use different method for processing text input (like with using tuxpaint for drawing, in few games).

/Estel