Maybe I'm having a different issue, but all of my soft keys, and my notification pane have disappeared. I've cleared the cache partition through recovery, and I've cleared the app cache through the menu interface as described above (I had to go to all apps to get to the settings app because my notification shade isn't there, so I couldn't get to settings that way).
They are all still missing when I boot into safe mode, so I don't think it's a 3rd party app conflict.
I am resistant to do a factory reset because I've already done one since upgrading to lollipop a week ago (a that time my phone would boot into a blank screen (the 4 color dots would dance, then I'd see "android", then just a blank screen)).
If I need to do another factory reset I guess I can do that, but I really hope it's not a weekly ritual to keep this phone working.
Never rooted this device. I've kept it as stock as I can in hopes of avoiding this kind of messiness.
11-27-2014 12:42 PM