Comment 12 for bug 1236035

my site -running ubuntu 14.04 lts server 64bit edition- uses the mcrypt too. somehow the default installation did not enable the mcrypt.

so we do have to enable it manually by doing "sudo php5enmod mcrypt", restart the apache, and voila!

sudo php5enmod mcrypt
sudo service apache2 restart
cd /etc/php5/apache2/conf.d
ls -la | grep mcrypt
lrwxrwxrwx 1 root root 31 May 13 14:37 20-mcrypt.ini -> ../../mods-available/mcrypt.ini