i don't have time to write something up from work (darn those pesky bosses) and I am working until 9 PM my time, but I will take a stab at it tomorrow. In the meantime, this is not top-secret
, so chances are someone else will write it up.
As I said, I don't have problems with a book purchased/downloaded from a real bookseller--this is true even when I do a format conversion, for example, a kindle book that magically becomes an ePUB on my device. There may be the rare instance when the publisher does something screwy or kobo screws up a particular book, but it's not a device issue--it is, again, a formatting issue. I routinely buy from BOB, Smashwords, Google, B&N, and Amazon without incident. I'll be interested to read what your experience is like.