It appears as if Google’s Blogger service have had some issues over the weekend. On Friday, they marked bunch of blogs as spam, which was quickly identified and written about. The issue was resolved on Saturday, with explanations:
We want to offer our sincerest apologies to affected bloggers and their readers. We’ve tracked down the problem to a bug in our data processing code that locked blogs even when our algorithms concluded they were not spam. We are adding additional monitoring and process checks to ensure that bugs of this magnitude are caught before they can affect your data.
This isn’t a good thing for Blogger of course, and certainly hurts the brand.