Adobe DRM 4.5 and Kobo

After buying a Clara HD and never being able to borrow a book from overdrive, I found this thread, downgraded to 2.0 and finally it works. 

Is it true, Adobe likes to release untested, broken applications?

https://www.reddit.com/r/kobo/comments/hnwd34/your_ereader_is_not_authorized_to_open_this_book/