Hi Piwigo Community,
Release 2.1.1 is available. It fixes a major bug. Not a security bug, but a serious bug.
* modify guest settings breaks registration (and you loose default theme/language)
* incorrect display of tabs in administration panel with Internet Explorer 8
All details available on http://piwigo.org/releases/2.1.1
Follow the automatic upgrade procedure and run the most recent Piwigo version.