Just like the messages link goes bold when there's an unread message, make the notifications link go bold when there's an unread reply on a tracked thread.

If you use reddit.com: the envelope goes orange when someone responds to a comment you made.

Would be way too annoying, a lot simpler and easy to just hit topic tracker.

The point is you know *when* to hit topic tracker.

Please read this first: http://forums.d2jsp.org/topic.php?t=57896631&f=258
It guides you to make good suggestions with polls.
Also this has been suggested before and shot down.
I always go via tracked topic or just refresh (f5) tracker. I dont think this feature would be needed.

Sounds like a lot of coding, when all you have to do is click topic tracker.