Self-edited: (mockup lacked thread starter identity. Overlooked that. So, lucky you, no mockup.)
jordanjay29 This honestly reminds me of all the little icons that boards used to have to tell you what was hot, what was locked, what you replied to, etc, etc.
You're right, the colored square idea wasn't good.
Better might be to color the background of the entire list item containing div a faint yellow (or whatever default you wanted). Then there wouldn't be a need for any additional UI gizmo at all. You would only see the "new item" color when logged in, for the personalized effect, and it would go away when you opened the thread.
But we (CSF) will wait for the stable release and be happy when it gets there.
Btw, I would think UI changes like this would be on the stable v2 roadmap, not v1. Especially as the design is working decent as a V1. I know nobody is giving dates, but can we say a stable release will happen before 2017? I have people chomping at the bit to get enrolled now.