Critical Software Update for Kindle E-Readers
amazon.comyou get a backdoor, you get a backdoor, everybody gets a backdoor!
I was an happy owner of a Kindle Keyboard, on which I could easily manage my collections with Calibre and go on reading four hours a day for a month without recharging.
With paperwhite (first gen) I got roughly two weeks of charge even with lowest brightness because I can't turn the lights off, and for using Calibre I had to crack my Kindle and keep it offline or it would upgrade itself...
So whatever this update does, it's a NO-GO for me.
I have gone with an Android eink reader so that I can use calibre companion on it. It makes calibre a lot more useful. Look into it when you need to upgrade or replace your kindle. If you are using calibre with your kindle I am assuming you remove drm anyway.