I noticed this:
As you can see, some users have a dotted border around their profile picture. I recently changed my profile picture, but Renan didn't, as far as I know. This really isn't something on the picture, I checked, it's in the stylesheet of the website (see below).
I can't find a logic in who has the border and who hasn't. It's the same all the time though.
Users with a dotted border have a somewhat malformed profile page: the user's info starts below the image. Have a look at my profile for example.
This has been fixed. The dotted borders still appear though.
This is EE-specific. I can't find any picture on WordPress Answers or TeX with the dotted border.
I took a look at the HTML, and found that the users with dotted border are in a
<div> with class
gravatar-wrapper-32. The other users are in a
<div> with no class at all. The CSS (
border: 1px dotted rgb(195, 181, 156);) is linked to the class