There was an annoying usability issue with downfly when you wanted to add a comment to a link you liked.

After viewing the link, you’d then have to go to downfly, find the link, and add a comment to it.

As a nice solution to this (and to keep with the theme of keeping workflow), when you now view a link, there is a DOWNFLY bar up top that allows you to add a comment without having to leave the page. It also shows you the comments already left by anyone else.