HTC Mozart getting mysterious firmware update

We have now had a number of reports of HTC 7 Mozart users being prompted to update their firmware with a HTC Specific update.  This is for devices that have already had the NoDo and Post-NoDo update, so clearly not Microsoft related.

HTC’s support forums are silent on the matter, but will hopefully post soon what has changed.

Thanks Moritz and Sasha for the tip.