Well, e-readers screens are fragile, cybook or not it seams.
I had the bad surprise to find my screen loking like that :
image
Bokeen told me "the screen has hit there". I don't know when or how, but traces on the case and screen had told me so. I had to pay for the replacement, but, i was glad of the fact the reader spent only one week out of my hands
I learned the lesson, e-reader in bag front pocket + bumping said bag everywhere = BAD !
i now put the reader inside the bag, screen in my direction. So any shok would hit the back of the reader, rather than the screen.
That one looked like to me it was hit too.
image
Same, a brocken Irex screen looked more like this.
These images where the screen became partly blank, still showing part of the letters, for no apparent reason, make me thing it's someting else. But what. That i can't figure out.