i was looking through some old layouts, and like this one:
http://www.createblog.com/layouts/preview.php?id=8235

the iframes you guys use for the layout aren't working...

the blog.html doesn't exist, so every layout you guys made a preview for with the blog.html iframe, its preview doesnt work

Well, there never was an actual "blog.html" and such, so its always looked like that.
The reason it has "blog.html" or w/e is so people know what to put where I suppose.