On dicembre - 20 - 2009
During an automatic upgrade, WordPress places a file in the blog root directory called “.maintenance” to prevent visitors from being confronted with ugly, broken pages during the upgrade process. That’s a great little built-in feature, but if the upgrade gets interrupted or fails for any reason, that file doesn’t get deleted and nobody, including you, can access your blog. No worries, this is (most likely) the simplest fix on Earth.
All you have to do is delete the .maintenance file from the blog root directory.
TNX2WordPress Hacker
