* Anything entered through the paddles, including keyer commands, will end
  up on the keying and muting outputs, thus keying the trasmitter. This is
  hard to prevent given the original design this keyer is based upon, which
  is strongly oriented towards saving battery powers through the use of the
  low-power internal 48 kHz oscillator of PIC 16F628A, a design choice that
  requires real-time (i.e. "synchronous") sections in the code. I personally
  do not find this to be a real problem, but others may think otherwise
  so I've listed it here as a bug, but that's questionable.

* I'm sure there must be other (real) bugs I'm not aware of. If you find
  them please let me know, and if you also provide a fix so the better :-)