I hope this to be the problem!!!
But something is telling me that is a hardware question: The Falcon F16 ceased to get straight the plane on the horizon pressing the "Help" key (that was the first sign that something wasn't going right...).
Anyway, I'll try to boot a 1.3 WB and change the keymap, as soon as I go back at home (Which won't be at the near future :-( ).
Something surely I'll have to do, is to make sure that the plastic pad is well inserted at the microcontroller plate: I'll have to use a tester on the first bad key trace (the "Help" one) over the junction at the plate (or the first component on the plate, since its very hard to plug it out)
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Fisting milf