A similar problem was reported for a small number of Pocketbook 301 units (a Netronix 600 OEM). According to the
people in the know, it was caused by a bad batch of LG screens, which affected not only Pocketbook but also Sony and Amazon. On the
photos from nrg you can see that he got an LG screen as well (model number LB060S01, PVI screens are ED060SCx).