I'm not sure if this is a regression in 14.04, but php5-mcrypt 5.4.6-0ubuntu5 in 14.04 is missing some maintainer scripts:
~> dpkg-query --control-list php5-mcrypt preinst md5sums
whereas for any other extension, the list looks like this:
~> dpkg-query --control-list php5-curl preinst postrm md5sums prerm postinst triggers
The absence of a postinst script causes the extension to not be enabled after install.
I'm not sure if this is a regression in 14.04, but php5-mcrypt 5.4.6-0ubuntu5 in 14.04 is missing some maintainer scripts:
~> dpkg-query --control-list php5-mcrypt
preinst
md5sums
whereas for any other extension, the list looks like this:
~> dpkg-query --control-list php5-curl
preinst
postrm
md5sums
prerm
postinst
triggers
The absence of a postinst script causes the extension to not be enabled after install.