Just to let you know, when you preview a new thread (not sure about a new reply -- haven't experimented with that, yet), it removes double carriage returns.

So, a thread that's formatted like this.

Eventually looks like the text below, which is exactly the way this text appeared in the box after I clicked "Preview Post":
Just to let you know, when you preview a new thread (not sure about a new reply -- haven't experimented with that, yet), it removes double carriage returns.
So, a thread that's formatted like this.
Eventually looks like the text below, which is exactly the way this text appeared in the box after I clicked "Preview Post":