For a couple days now, I have been spotting random threads with complaints from Blogger aka blogspot.com bloggers that Google has stopped indexing and ranking their new blog posts in Google web search.
It turns out to be a large problem. A Google Webmaster Help thread has tons of bloggers upset with a recent change. It appears to be a bug either on the Blogger side or on the GoogleBot side.
JohnMu from Google said:
Thanks for posting about this issue. We've been tracking and reviewing these reports and have passed your feedback on to the teams to review. I'll check through these specific sites mentioned here and post back as I know more. Feel free to post more examples if you feel they aren't similar to previously mentioned ones.
Google is looking into this, we are still not sure where the bug resides or how large the bug is, but it is an issue.
Forum discussion at Google Webmaster Help.
Update: The issue should now be resolved, please see our update for more information.