wp-plugins/advanced-blog-metrics — pull request #1 by larruda (2014-02-26 21:15:53+00:00)
Title: Fixes an issue on querying some metrics using MySQL 5.1.10 or prior

...which throws an "ERROR 1140 (42000): Mixing of GROUP columns
(MIN(),MAX(),COUNT(),...)
with no GROUP columns is illegal if there is no GROUP BY clause" and the
data is not shown. The columns removed are not necessary as per the
implementation.