K5synth

Hi everyone, Kawai of Japan told me so far that the main difference 
between each versions is the following:

V1.0 - power on with Single mode.
V1.1 - power on with Multi mode.
V1.2 - power on with Multi mode + additional parameters.

I asked them if there are bug fixes since I seem to remember that a ROM 
upgrade fixed problems for some people here a few years ago.
I asked about version 1.3 too.