The UIEditBox causes a null pointer error if you arrow forward.
Here’s what a I did to produce the error:
Type in about 40 characters of text. Arrow over to the middle of the text. Hit the delete key a few times. Right arrow over to the right past the end of the existing text. Hit backspace. Crash.
Additionally, an a related note, although it’s not a huge bug, I’ve noticed that if you type quickly the cursor does not retain the correct position after the last typed character.