I'd like to report what others above were experiencing (certain typed characters not showing up).
I just created a new mountain page and could not get a plethora of characters to show up as I typed them. These included the letters k and m (although K and M in capital form worked fine, oddly enough), ", !, %, (, and my arrow keys. Made for frustrating work. Luckily the page did not require lengthy descriptions, but typing up anything longer would have been torture. FWIW, I am using Chrome.