Posted this over in the Amazon & DRM changes thread, but just to mention it here...
I manually updated my PW5 to new firmware 5.18.2 and I sent books to it over wifi and then added them to Calibre and everything was fine. Worked exactly the same as in 5.18.1.
The first few books were older books that still work with K4PC 2.4.0. The last 2 books I did were brand new and K4PC 2.4.0 will not download them. All worked fine on the PW5/5.18.2 to Calibre import.
https://www.mobileread.com/forums/sh...postcount=2621