more updated variable formatting and accommodation of the YAML parser being a fussbudget

roles/common/tasks/encfs.yml

 - name: Install encfs & fuse
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - encfs
     - libfuse-dev

roles/common/tasks/main.yml

   apt: upgrade=safe
 
 - name: Install necessities and nice-to-haves
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - sudo
     - vim

roles/common/tasks/security.yml

 - name: Install security-related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - fail2ban
     - rkhunter

roles/ircbouncer/tasks/znc.yml

 # more or less as per http://wiki.znc.in/Running_ZNC_as_a_system_daemon
 
 - name: Install znc dependencies
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - build-essential
     - libssl-dev

roles/mailserver/tasks/dovecot.yml

 - name: Install Dovecot and related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - dovecot-core
     - dovecot-imapd
 - name: Ensure mail domain directories are in place
   file: state=directory path=/decrypted/{{ item.name }} owner=vmail group=dovecot mode=770
   with_items:
-    - {{ mail_virtual_domains }}
+    - "{{ mail_virtual_domains }}"
 
 - name: Ensure mail directories are in place
   file: state=directory path=/decrypted/{{ item.name }}/{{ item.primary_user }} owner=vmail group=dovecot
   with_items:
-    - {{ mail_virtual_domains }}
+    - "{{ mail_virtual_domains }}"
 
 - name: Copy dovecot.conf into place
   copy: src=etc_dovecot_dovecot.conf dest=/etc/dovecot/dovecot.conf

roles/mailserver/tasks/dspam.yml

 - name: Install dspam and related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - dspam
     - dovecot-antispam
 - name: Put sieve rules into each primary user directory
   copy: src=dot_dovecot.sieve dest=/decrypted/{{ item.name }}/{{ item.primary_user }}/.dovecot.sieve owner=vmail group=dovecot
   with_items:
-    - {{ mail_virtual_domains }}
+    - "{{ mail_virtual_domains }}"
   notify: restart dovecot

roles/mailserver/tasks/opendkim.yml

 # Handy reference: http://stevejenkins.com/blog/2010/09/how-to-get-dkim-domainkeys-identified-mail-working-on-centos-5-5-and-postfix-using-opendkim/
 
 - name: Install OpenDKIM and related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - opendkim
     - opendkim-tools
 - name: Create OpenDKIM key directories
   file: state=directory path=/etc/opendkim/keys/{{ item.name }} group=opendkim owner=opendkim
   with_items:
-    - {{ mail_virtual_domains }}
+    - "{{ mail_virtual_domains }}"
 
 - name: Generate OpenDKIM keys
   command: opendkim-genkey -r -d {{ item.name }} -D /etc/opendkim/keys/{{ item.name }}/ creates=/etc/opendkim/keys/{{ item.name }}/default.private
   with_items:
-    - {{ mail_virtual_domains }}
+    - "{{ mail_virtual_domains }}"
 
 - name: Put opendkim.conf into place
   copy: src=etc_opendkim.conf dest=/etc/opendkim.conf owner=opendkim group=opendkim

roles/mailserver/tasks/postfix.yml

 - name: Install Postfix and related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - postfix
     - mysql-server

roles/mailserver/tasks/solr.yml

 - name: Install Solr and related packages
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - solr-tomcat
     - dovecot-solr

roles/tarsnap/tasks/tarsnap.yml

 - name: Install dependencies for Tarsnap
-  apt: pkg=$item state=installed
+  apt: pkg={{ item }} state=installed
   with_items:
     - libssl-dev
     - zlib1g-dev

roles/webmail/tasks/roundcube.yml

 - name: Install Roundcube
-  apt: pkg=$item state=latest
+  apt: pkg={{ item }} state=latest
   with_items:
     - roundcube
     - roundcube-plugins