Often when a teacher uses a text box, a stray bit of HTML appears out of no where:

<div id="gtx-trans" style="position: absolute; left: -159px; top: -20px;"></div>

This makes a strange, annoying little square on the page. A user can fix this by deleting that code from with HTML view of the text box but...why is it there?!?!?!?!?