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It looks like Google programming standards are slipping.
When commenting, without logging in first, blogger would save your work, log you in, then post your comment.
Now because of a crappy programming and lazy QA, blogger just throws the comments away.
When this first happened to me, I thought they'd fix it soon. But now it's gone on for weeks.
I assume they are having meetings every day, while they decide what to do about it.