Blogger hosted on Blogspot and you've not already seen the latest Blogger status page post, I just thought I'd draw attention to it. While they've fixed the problems some people were having, they say (my emphasis):
if your blog was on [the problem] database, posts and template changes made in the last 18 hours or so were not saved. They may appear on your blog now, but will disappear if you republish. If you made a post between Friday afternoon and [Saturday 11 am PST], we suggest that you look at your list of posts (“Posting” tab, “Edit posts” sub-tab) and compare it with what is published on your blog. If posts are missing, copy them from your blog pages before you republish.
So it's best to check your Edit posts page if you've posted anything on Friday 17 February or Saturday 18 February, before you republish your blog after template changes or for any other reason, or you may lose recent posts you'd thought were fine.
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