This one isn't really a problem, it's just...a bit strange.
I frequently use the "Quick Reply" box when I post in threads. I don't know if it has any bearing on why this thing I'm about to describe happens. But I thought I'd mention it.
Usually, when I post in a thread, then click "New Posts," the thread I just posted in shows no new posts. It isn't in bold, and the "Go to first new post" button isn't there.
But sometimes, I will post in a thread, click "New Posts," and the thread I just posted in will be in bold, and there will be a "Go to first new post" button beside it, which takes me to...my post.
It doesn't always do this, just sometimes. It can't be TOO related to the Quick Reply box, because normally it doesn't happen. Just sometimes. Any idea why in the world this would only happen like 2% of the time?