The community bot brings up a lot of questions that have been answered except the original asker never accepted. This causes a lot of old questions to be put into the unanswered pile and on the homepage. I think we need a privilege to vote for an accepted answer on a question older than a certain date 30 days for example. It will help us get to the "truly" unanswered questions faster.

 example 
1. https://serverfault.com/questions/168302/installed-php-module-and-restarted-nginx-but-but-php-configuration-isnt-updating
2. https://serverfault.com/questions/36890/setting-max-allowed-packet-for-mysql-on-solaris-10