Hi,

A lot of messages:

Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /var/www/piwigo/plugins/ExtendedDescription/main.inc.php on line 180

Piwigo version
        Piwigo 2.6.1
Environment
        Operating system: Linux
        PHP: 5.5.3-1ubuntu2.1 (Show info) [2014-01-27 22:23:49]
        MySQL: 5.5.35-0ubuntu0.13.10.1 [2014-01-27 22:23:49]
        Graphics Library: GD 2.1.1-dev

Thank you