[chuckz]

I guess I am the only one here who reads image-scanned pdfs - and those two changes make the whole difference for me:
1) zoom scale arranged in the portrait mode is maintained in the landscape mode and
2) I am able to move down the current page in case the book page is bigger than the screen (the triangular page-cutting marks show the cutting line with a substantial overlap)

These two features allow reading in the landcape mode which makes a lot of sense considering that a real book page gets all squeezed in a portrait mode so that even the best resolution makes it impossible to read for more than a few minutes.

My gratitude to the developers is a little diminished though - since these features must have been there from the beginning :-)

Philosophically speaking, when e-readers were starting up, not many books were OCR-d yet and put online for downloading from libraries or stores. Many of the older readers were equipped with pdf-reading features. Then, tons of epubs have appeared with these features becoming kind or redundant. Nowadays people realize that not only many books they want have not been OCR-d but those available are full of errors. And some of us like a feel of a real paper book on the device, with wrinkled pages and underlinings.