I haven’t been able to find the page where that css would add the glow you specify. However, if you’re interested in adding that bold, golden glow to the avatar image of a topic owner on their posts, you could use this:
.topic-owner > article > .row > .topic-avatar > .post-avatar > a > img {
box-shadow: 0 0 0 1px rgba(255,255,255,0.3), 0 0 0 1.5px #F99A07, 0 0 10px 4px rgba(244,148,14,0.75);
}
If you can provide a screen shot of the page you’re working on, where this worked previously, I might be able to help with that more specifically.
– EDIT –
What template were you using this on?