I like the ability to just scroll back into a discussion and lazy load the content.
One thing i would appreciate is the removal of the top/bot margin on the “post-menu-area clearfix” which contains the reply/like/share button: each post takes a bit too much vertical space, i want to see more answers per screen.
Might be even better to hide this extra div and show it on hover of the post.
current:
no margin:
