Steps to reproduce
Have some unread comments in your inbox
Go to the "Unread Messages" section on the homepage
Click the "Reply" button on any of the messages
Click into the textarea of the popup that shows up, then click outside of the popup without entering text
The "Brevity is the soul of wit" failed min-length validation message shows up, but the "Comment" and "Close" button are positioned on top of it. See first screenshot.
What should happen
The failed validation message and the buttons should not be overlapping. See the second screenshot on how the hint should be behaving. That solution was done by giving the hint a margin-right similar to the space the buttons take up (~15em).
The same code is used in the inbox, but the overlap isn't happening because the container is wider. Make sure that the solution for the homepage doesn't break the layout in the inbox.