I have noticed an issue over the past two weeks or so of an infrequent problem. Sometimes when I click on "quote" it will not quote and instead give me a blank space like I'm posting a normal reply, noticed the same thing today with edit. It seems to be temperamental, sometimes working fine, others not. I've tried quoting a response a couple of times on a thread and it isn't working. (On Firefox, if that's of any help.)