Since then, there are a couple of strange things going on with my subscriptions:
* I can visit it, but it still shows up in my subscriptions under Activity as unread/unviewed. No matter how many times I visit it. I'd like to stay subscribed to it in case someone posts a comment.
* For some reason, now I am getting subscription notifications for this thread even though I am not subscribed to it: http://www.head-fi.org/t/716711/the-best-bass-headphones-are-the-extreme-bass-club