Padding on textareas is incorrect: it should be *inside* the textarea, not *outside*
Creating a textarea and giving it 5px padding all around doesn't do the right thing. Instead of getting a textarea that has 5px between the textarea boundaries and the contained text, the padding is applied to a container *outside* the textarea.
The pink outline in the image (which, unfortunately, just happens to matche the background of the Problem report!) is the incorrectly-applied padding. It acts more like a margin outside the textarea than padding inside it:
The green outline in the image is correctly-applied textarea padding. I added an extra line of text because getting the padding right made it so that the textarea could contain more without scrolling: