Thanks people for checking out this issue.
I have just now bought my M92 from Booxtor, and have good reason to think that it is from the latest batch. I have also upgraded the firmware to the latest 1.7.20120726, though had the "boot freezing" problem after restart. So I had to install the special firmware update posted at
https://www.mobileread.com/forums/sho...8&postcount=36 to get it functional again. Then reinstalled the latest normal update on top of that again.
It would be nice if Booxtor could check whether this fault is present in all devices in the latest delivery batch, or only some E readers (like mine and Janek's) have it as a result of poor quality control at factory.
Mono, It would be great if you could find the relevant posts (or at least the thread) on the Russian forum you mentioned. I don't speak Russian, but if only few posts need to be translated I can do that with Google translator.
It is important for me to get this bug fixed, because it really spoils the darker photos and graphics.