tombo : Yes I noticed that too on some pdfs. Also sometimes for no reason that black bar is simply missing until I reload the file. Pdf behavior has become totally inconsistent, in addition to being buggy. And indeed they can't keep claiming pdf ain't their priority while in the same time pusing pdf papers on their device. I reported the first bug yesterday on their live chat, but I won't hold my breath.
voidoid : Indeed I got the idea of how to get back to 2.1.5 by reading your post. Thank you for this. I simply did a factory reset, then powered up the Kobo app to activate the device, then I deleted the 3 update files and replaced them by the 2.1.5 files just before disconnecting and here we go, I'm back to 2.1.5 and mostly happy with it.
Glad I found help on this forum and happy to join this helpful community,