I was just scanning the new and *improved* TTL.  I happened to pause over a user and was surprised to see their address show up:

I was very surprised to see this and looked at 's profile in the forum and could not see the same information.  I paused over a few more profiles in the TTL and the address did not show on everyone, but it did on a few.

As far as I know this is a new and unannounced "feature".  I am just posting to make people aware in case information is being revealed without your knowledge and which you want to remain private.

Also, apparently the icons on the right make it easy to contact the person directly.