I just realised that I have to keep two tabs open to post. In one tab, I have the original post from which I'm quoting and the next tab is where I'm actually writing my post.
Would it be possible to have a sort of Quick Post feature? It would really come in handy!
I think in our next reincarnation the post input box will be below the existing posts, like on most other forums, so we can scroll up to see that to which we are replying.