Update:
I am happy to say that at least one thing that I thought was a software bug was user error - when I was trying to exit the font screen and kept going back to the mp3 page - because the touchscreen wasn't working consistently before the FW update - I tended to click the arrow to escape that screen, and it turns out that is a short cut to the Music app.
I also realized that the reason I couldn't browse my books by their covers was because Calibre transferred them into author folders. So I connected the T62 to my computer and sorted the 40 books I had added into fiction and subfiction folders (without the author folders) and now I can browse them by covers. Which is soooo nice compared to all these years with the Kindle listing the titles without any cover photos.
The FW also fixed something I had noticed before but hadn't mentioned. All contractions were displaying incorrectly in the default reading app. For example
I've looked like
I 've and
can't looked like
can 't. That was very annoying, but seems to be fixed now.
And also, the device
finally went to sleep and switched to the screen saver after inactivity... so that seems to be fixed also.
One thing with which I am still struggling though... it seems like I have to reset the font, to the larger size I prefer, every time I open a book. Is there some way to set it for the device?
Thanks in advance for any advice!