I have installed the forum module 2012 version as I had some CSS issues with a modified blackcandy theme.
Installing the 2012 version fixed the problem of the forum content been pushed down the page, below the bottom of the author block on the left of the post. And it all looks like it does here on these forums
But I then checked on another theme that I edited and that has the forum content pushed down below the author block on the left of the post also. But they are both using the same default forum templates
So I am really confused. As both the layout css for both themes are very similar.
I eagerly look forward to hearing from someone on this.