I have Onyx Boox M92 "Black Pearl" with mixed firmware and latest version of PDF reader. My bug report (not only for new pdf reader):
1) Stand-by time: I set the stand-by mode after 10 minutes. When I want to go into standby manually, if I press the physical key is okay, but if I press the home button and then I select stand-by with the stylus the player goes into stand-by but TURN ON by itself after 10 minutes .. .
2) In portrait mode the virtual button next to the virtual key "refresh" can not be selected while in landscape mode everything is ok.
3) In "new tool margin" the left margin often are unable to move from the central square and sometimes you can not move at all.
Sorry for automatic translation.