And next: Preview for Blog Posts
And we have the next feature, a preview for blog posts. There's a new shiny Preview button, if you edit posts, click it and a new window pops up, which shows you a real preview of your post. It's not saved in the original post, so this works also, if you edit an already published post without publishing it. But this means also, you should not forget to actually save the post, otherwise the changes are lost.
If the popup window doesn't show up, Firefox most presumably blocks it and shows a message like the one below. Just click on the message and then "Allow popups for example.org" and you won't be bothered anymore with that :)
If you click preview a second time and the preview doesn't update, you maybe have to do shift/control/whatever+reload to really reload it from the server and not take it from the cache.
Addition: It needs a db update (you know, http://example.org/admin/webinc/update/) to make the preview work.