Just for completeness, I will mention that in the early hours of this morning (sometime between 0100 & 0200 hours) I followed my own advice and updated the firmware of my
VMG1312-B10A from
V1.00(AAJZ.13)C0 to
V1.00(AAJZ.14)C0 without any drama, mishap or any other unforeseen happening.
b*cat is now non-grumpy.