Here's how to reproduce: Create a quiz. Add an essay question. Attempt the quiz as a student add some text to the essay question. Select a word, click on the button to make it bold. Double-click on a different word, click on the button to add italics * Verify * the word that is now selected becomes italics, not the bold word. Double-click in the middle of a word in bold. * Verify * the bold button is depressed (active). Double-click in the middle of the word in italic. * Verify * the italic button is depressed (active). Submit all and finish. Go to Quiz administration -> Results -> Grades Click the score for a question (acually it will probably say 'Requires grading') to open a review of that question in a pop-up. Click on "Make comment or override mark" to grade the question Go to the comment field and add some text. Select a word, click on the button to make it bold. Double-click on a different word, click on the button to add italics * Verify * the word that is now selected becomes italics, not the bold word. Double-click in the middle of a word in bold. * Verify * the bold button is depressed (active). Double-click in the middle of the word in italic.