This is very likely a bug, but I'm reporting it here for reference and for the slight chance of someone being able to propose a workaround.
IE 11 supports the placeholder
attribute natively on textarea
elements. That's great. But adding a new textarea with a placeholder to the DOM, it automatically puts the placeholder text into the textarea's field, too!
Here's the repro: http://jsfiddle.net/wE577/1/