bug fixes (including security)
number of views, hide decimals when less than 1k
[security] identification should redirect within Piwigo only
user list backend, check input parameter
The album synchronise link reaches the page to synchronise ./galleries/ even if the album is located in another folder
File inclusion in administration
PIWIGO API - pwg.categories.delete doesn't work properly.
Batch downloader failing using pclzip and php 7.1
batch manager, delete photo does not work with Safari
disk usage, hide decimals when more than 100GB
admin dashboard, need trigger for plugins
[php7.1] user edit box,  operator not supported for strings
Bug Report: Cross Site Scripting(XSS) in page parameter of admin.php
SQL error in tour 2.9
input parameter "redirect_decoded" is not valid
French Canadian (Québecois)
Vietnamese (Tiếng Việt)
Hong-Kong Chinese (中文香港)
We recommend the automatic upgrade. If you're running version 2.2+, Piwigo will tell you which plugins may be not compatible with Piwigo 2.9 before upgrade.
If you're running Piwigo 2.9.x you can also download the 2.9.x_to_2.9.1.zip archive that contains all new and modified files. Once you have extracted the files, transfer them onto your web server with a FTP client over your Piwigo 2.9.x installation. No database upgrade is required.
If you are running a version older than 2.9 and do not want to use the automatic upgrade, then follow the manual upgrade.