5.3.83
     *  TextGrid window: repaired a bug with automatic alignment that
       could cause an analysis tier to go out of order.
     *  Linux audio: created a second workaround that reduces even more
       the chances of a freeze that is due to a potential deadlock in the
       collaboration between Alsa and PulseAudio that can occur when the
       playback of a sound is cancelled.
     *  Smoother communication with Phon.
     *  Windows: repaired a memory leak when saving PNG files.
 5.3.84
     *  Manipulation: repaired a bug that could cause Praat to crash when
       playing a manipulation of a Sound created by the
       SpeechSynthesizer.
     *  Mac: repaired a bug that could cause poor sound quality on some
       USB headphones when playing a sound with a low sampling frequency.