I have been having a pretty annoying issue happening with .191
For some reason, the lower 1/5 of my screen will randomly become white and unusable. The only way to fix it, is to go into landscape and then back into portrait. Also, my unlock is finicky. I will unlock it, and it will actually go to the home screen, then I go to click an icon, and boom, it is locked again. Sometimes, this happens a few times in a row.