Today is the last day of MOODLE_17_STABLE in the Moodle Tracker. As Martin mentioned in the moodle.org news back in February, New releases: Moodle 1.9.4, 1.8.8, 1.7.7 and 1.6.9,
Moodle 1.6.9 and Moodle 1.7.7 mark the last builds that the core team plan to release from those branches… please upgrade to later versions!
For anyone interested, our process of dropping support for older stable branches is detailed in Development:Stable branch support.
Keeping your site up-to-date is highly recommended in order to keep your site secure. Also recommended is to regularly run the Security overview report in Site Administration > Reports > Security overview (source: Hacked site recovery).
Moodle Helen 