nailed it, but there may be no fix
'seems like' in the case of only some systems the keystrokes are trapped
in front a few microseconds' worth of bounce-filtering wisdom, but not
so in others. I'm only guessing this, never seen the problem under
windows yet, haven't tested all 5 of my linux installs nor all the linux
WM's.
The keyboard as hardware, like the laptop it's on, is a total POS. It is
convex and loose and the paint was coming off the caps so I replaced it
with hopes for improvement. The new keyboard is WORSE. So I put some
2-way tape under it but even the supporting metal membrane is so flimsy
that the bounce is just as bad. Other than that the product is good
paperweight.