Sorry for raising
GitHub issue here (and not on GitHub itself).
Home button on KT doesn't work because of this code (at
frontend/ui/inputevent.lua):
Code:
function Input:init()
# ...
if Device:hasKeyboard() then
self:initKeyMap()
end

Let's count it as half-a-bug, because, ehm... Kindle Touch has no keyboard, right. But it has the key!