Obviously even more thanks for this amazing skin, Indigo. It's beautiful and warms me in places.
I decided to use the forums for a little while to get used to things before I would recommend anything (because often you just get used to certain things). I only have two things at present that irk me.
The first is the "there are unread posts" little icon. I use this religiously, so it's something I noticed very quickly and that impacts how I use the site a lot.

(Made this wide as an excuse to test the image size thing.)
At first it was completely unnoticeable to me (don't know if you want to change that to accommodate newer users), but now it's easy for me to spot them. The problem I am still facing is the small size (at least compared to the previous skin where it was a massive "NEW" box).
Would you be able to make the clickable area slightly larger? Making the actual icon larger is up to you, and maybe you could add an edge or two to it to attract the eye more, but mostly it's just inconvenient to click. #firstworldproblems
The second issue I have is the anchor text under your username in the top right (the links). I just struggle to read this and I'm not a fan of blue on blue with blue. Might just be a personal gripe though, so not really any priority.

Mostly though I'm just really enjoying using this new skin and it's definitely helped activity.