I started using PE about 3 days ago and I've "discovered" a few bugs. I'm sure all of these have been addressed somewhere in this thread, but as it's 188 pages long...
The front facing camera doesn't work anymore. It comes on and looks fine, but when taking a picture it creates a weird looking almost heatmap-like image.
The fingerprint reader will unlock the phone, but will not lock it.
The screen will occasionally freak out like it's being touched by someone having a seizure and a ton of things will open, close, and then the phone will bring up the turn off/restart screen and the screen will shut off (the phone doesn't restart itself, to be clear). This could just be a weird glitch caused by my broken screen, but it didn't start till I flashed ROM's, so it could be a coincidence but it could also not be.
When using the "Search Settings" function, the camera app crashes every time I tap to type something and then when I actually do get to search for a setting I get "Settings Suggestions keeps stopping."
I'll be honest, none of these things really bother me that much as I don't use my front facing camera very often, I'm not inconvenienced by using the power button to lock it, and I find the screen freak out kinda neat, but if anyone has any fixes to these problems, I'd be pretty happy to try them out and see if they work.
Edit: Found the 4th one just after posting.