I don't know if you can do anything about this, but I thought I'd ask.
When you're writing a post and you click Preview, for some reason you're left looking at the editing box. To actually see the preview you just requested, you must scroll back to the top of the page. Each. Time.
It'd be great if GH did this automatically. Some of you may have a particular fondness for scrolling—but for most of us, I can't think of any reason why it wouldn't be preferable.
Thanks, A.