In some edit fields on websites (and, I am told in the Mars Edit app), VoiceOver behaves oddly. The punctuation level is sometimes ignored, and no punctuation is spoken; lines are sometimes spoken twice when you move to one with up or down arrow; and Command or Option with the arrow keys are unreliable for moving around the text. Not all of these happen all the time, but at least one of them happens nearly always. Not all edit fields are affected. One that does exhibit the behavior is at www.applevis.com. Go there, sign into your account, click Submit Content, click Guide or Tutorial, and write a few lines of text in the Body field, then try to move around with the arrow keys. You should see the afore mentioned problems start happening immediately.