Tumblr mistake or security issue

There is a post on Hacker News about a possible security issue with Tumblr. Basically a lot of confidential information, including server IPS, API keys, passwords, etc were leaked. Here is some of the stuff that was disclosed:

Database::set_defaults(array( ‘user’ => ‘tumblr3′, ‘password’ => ‘m3MpH1C0Koh39….55Z8YWStbgTmcgQWJvFt4′, ..

define(‘MEMCACHE_HOST’, ‘’); define(‘MEMCACHE_VERSION_HOST’, ‘‘);

Database::add(‘primary’, array(‘host’ => ‘‘)); ..

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