I was unlucky enough the other day to click on the "update" button offered by Admin Tools to upgrade from 3.1.1 to 3.1.2.
After discovering this, I "downgraded" back to 3.1.1 :
https://www.akeebabackup.com/home/news/55-general/1525-joompa-2512-312-updates.html
A few minutes ago, I received this notification
"An updated version of Joomla! is available.
Joomla! version currently installed: 3.1.1 Joomla! version available for installation: 3.1.4"
I suspect it is the samed problem.
I just wanted to share the information just to help others not to make the mistake of upgrading (the other day, for my "3.1.2" upgrade, I had seen no ticket reporting a problem and at first I hadn't seen the news above).
Yours,
Marc