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Blogger Status informed users of maintenance issues at 3:30 p.m. ET and wrote that the site would be in read-only mode until the problems were resolved. (The post was later removed.)
As of 9 p.m. ET, blogs were still inaccessible for users. According to DownRightNow, the outage had been uninterrupted for several hours. DownForEveryoneOrJustMe also confirmed the downtime.
http://www.huffingtonpost.com/2011/05/12/blogger-down-maintenance_n_861400.html