K5synth

I've always had a fond spot for the K-5, and now I
finally have one.  It's running v1.2 of the firmware,
and I've seen that there's a v1.3 that can be installed.
What I haven't been able to find are any release
notes or other list of the differences between 1.2
and 1.3.  What are the differences?  Is the collective
wisdom that it's a good upgrade to perform?

Thanks in advance,
BLS