Won't work for me, I have to copy and paste.
Yes, I have had problems as well. So far I have only tried Firefox on Windows. I get a 'Loading' message and that's it. If I close that loading message and click the + on the Quick Reply at the bottom (as I am doing here), the quote does appear in the box. If you want to use the full function editor after, just click on Preview. I wasn't going to report until I tried other browsers, etc. but since you started one I though I would add this detail.