I have noticed the site appearing quite strange after updating my adblock lists in my chrome extensions. I can still post, but it does make the site look strange and feel like it was constructed by a monkey with a laptop. Much like your case, my quick reply doesn't work anymore either. Not sure which list did it, but it's got to be one of the annoyance lists in my superblock extension. I also lost the controls in the message center of "advanced reply".