To put it mildly. I did write and publish a post yesterday, which published as if I had finished it in May (when I first started it). Then it disappeared - completely, not even a saved draft. It was definitely there yesterday. I liked the new Blogger interface, right up until this morning when I realized what it could do in my absence.
I hold out hope that it will reappear, in the meantime I will write something else. Teach me not to back up my posts offline.