diff --git a/Gemfile b/Gemfile
index a132f5be..e5ad6a76 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'devise', '1.3.4'
 gem 'devise_bushido_authenticatable', '1.0.0.alpha10', :require => 'devise_cas_authenticatable'
 
 gem 'mongoid', '~> 2.0.2'
-gem 'bson_ext', '~> 1.3.0'
+gem 'bson_ext', '~> 1.4.0'
 gem 'locomotive_mongoid_acts_as_tree', '0.1.5.7', :require => 'mongoid_acts_as_tree'
 gem 'will_paginate', '~> 3.0.0'
 
@@ -32,7 +32,7 @@ gem 'fog', '0.8.2'
 gem 'mimetype-fu'
 gem 'actionmailer-with-request', :require => 'actionmailer_with_request'
 gem 'heroku', '1.19.1'
-gem 'httparty', '>= 0.6.1'
+gem 'httparty', '0.7.8'
 gem 'RedCloth', '4.2.8'
 gem 'delayed_job', '2.1.4'
 gem 'delayed_job_mongoid', '1.0.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 41135040..8a13e225 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
     Platform (0.4.0)
     RedCloth (4.2.8)
     SystemTimer (1.2.3)
-    ZenTest (4.6.1)
+    ZenTest (4.6.2)
     abstract (1.0.0)
     actionmailer (3.0.10)
       actionpack (= 3.0.10)
@@ -42,8 +42,8 @@ GEM
     autotest (4.4.6)
       ZenTest (>= 4.4.1)
     bcrypt-ruby (2.1.4)
-    bson (1.3.1)
-    bson_ext (1.3.1)
+    bson (1.4.0)
+    bson_ext (1.4.0)
     builder (2.1.2)
     bushido (0.0.35)
       highline (>= 1.6.1)
@@ -53,7 +53,7 @@ GEM
     bushido_stub (0.0.3)
       activesupport (>= 3.0.7)
     cancan (1.6.5)
-    capybara (1.0.1)
+    capybara (1.1.1)
       mime-types (>= 1.16)
       nokogiri (>= 1.3.3)
       rack (>= 1.0.0)
@@ -62,20 +62,20 @@ GEM
       xpath (~> 0.1.4)
     carrierwave (0.5.6)
       activesupport (~> 3.0)
-    cells (3.6.5)
+    cells (3.6.6)
       actionpack (~> 3.0)
       railties (~> 3.0)
-    childprocess (0.2.1)
+    childprocess (0.2.2)
       ffi (~> 1.0.6)
     columnize (0.3.4)
     configuration (1.3.1)
     crack (0.1.8)
-    cucumber (1.0.2)
+    cucumber (1.0.6)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.2)
-      gherkin (~> 2.4.5)
+      gherkin (~> 2.4.18)
       json (>= 1.4.6)
-      term-ansicolor (>= 1.0.5)
+      term-ansicolor (>= 1.0.6)
     cucumber-rails (1.0.2)
       capybara (>= 1.0.0)
       cucumber (~> 1.0.0)
@@ -99,15 +99,16 @@ GEM
       devise
       devise (>= 1.0.6)
       rubycas-client (>= 2.2.1)
-    diff-lcs (1.1.2)
-    dragonfly (0.9.5)
+    diff-lcs (1.1.3)
+    dragonfly (0.9.8)
       rack
     erubis (2.6.6)
       abstract (>= 1.0.0)
-    excon (0.6.5)
-    factory_girl (2.0.4)
-    factory_girl_rails (1.1.0)
-      factory_girl (~> 2.0.0)
+    excon (0.6.6)
+    factory_girl (2.1.2)
+      activesupport
+    factory_girl_rails (1.2.0)
+      factory_girl (~> 2.1.0)
       railties (>= 3.0.0)
     ffi (1.0.9)
     fog (0.8.2)
@@ -119,12 +120,12 @@ GEM
       net-ssh (>= 2.1.3)
       nokogiri (>= 1.4.4)
       ruby-hmac
-    formatador (0.2.0)
+    formatador (0.2.1)
     formtastic (1.2.4)
       actionpack (>= 2.3.7)
       activesupport (>= 2.3.7)
       i18n (~> 0.4)
-    gherkin (2.4.6)
+    gherkin (2.4.21)
       json (>= 1.4.6)
     growl-glue (1.0.7)
     haml (3.1.2)
@@ -132,7 +133,7 @@ GEM
     heroku (1.19.1)
       activesupport (>= 2.1.0)
       launchy (~> 0.3.2)
-      rest-client (>= 1.4.0, < 1.7.0)
+      rest-client (< 1.7.0, >= 1.4.0)
     highline (1.6.2)
     httparty (0.7.8)
       crack (= 0.1.8)
@@ -142,8 +143,8 @@ GEM
       responders (~> 0.6.0)
     jammit (0.6.3)
       yui-compressor (>= 0.9.3)
-    json (1.5.3)
-    json_pure (1.5.3)
+    json (1.6.1)
+    json_pure (1.6.1)
     kgio (2.6.0)
     launchy (0.3.7)
       configuration (>= 0.0.5)
@@ -167,23 +168,23 @@ GEM
     mimemagic (0.1.8)
     mimetype-fu (0.1.2)
     mocha (0.9.12)
-    mongo (1.3.1)
-      bson (>= 1.3.1)
+    mongo (1.4.0)
+      bson (= 1.4.0)
     mongoid (2.0.2)
       activemodel (~> 3.0)
       mongo (~> 1.3)
       tzinfo (~> 0.3.22)
-    net-ssh (2.1.4)
+    net-ssh (2.2.1)
     nokogiri (1.5.0)
     open4 (1.1.0)
     orm_adapter (0.0.5)
-    pickle (0.4.8)
+    pickle (0.4.10)
       cucumber (>= 0.8)
       rake
     polyglot (0.3.2)
     proxies (0.2.1)
-    rack (1.2.3)
-    rack-cache (1.0.2)
+    rack (1.2.4)
+    rack-cache (1.1)
       rack (>= 0.4)
     rack-mount (0.6.14)
       rack (>= 1.0.0)
@@ -207,7 +208,7 @@ GEM
     rake (0.9.2)
     rdoc (3.9.4)
     responders (0.6.4)
-    rest-client (1.6.3)
+    rest-client (1.6.7)
       mime-types (>= 1.16)
     rmagick (2.12.2)
     rspec (2.6.0)
@@ -249,9 +250,9 @@ GEM
     s3 (0.3.8)
       proxies (~> 0.2.0)
     sanitize (2.0.3)
-      nokogiri (>= 1.4.4, < 1.6)
+      nokogiri (< 1.6, >= 1.4.4)
     sass (3.1.2)
-    selenium-webdriver (2.4.0)
+    selenium-webdriver (2.7.0)
       childprocess (>= 0.2.1)
       ffi (>= 1.0.7)
       json_pure
@@ -263,13 +264,13 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.29)
-    unicorn (4.0.1)
+    unicorn (4.1.1)
       kgio (~> 2.4)
       rack
       raindrops (~> 0.6)
     warden (1.0.5)
       rack (>= 1.0)
-    will_paginate (3.0.0)
+    will_paginate (3.0.2)
     xpath (0.1.4)
       nokogiri (~> 1.3)
     yui-compressor (0.9.6)
@@ -284,7 +285,7 @@ DEPENDENCIES
   ZenTest
   actionmailer-with-request
   autotest
-  bson_ext (~> 1.3.0)
+  bson_ext (~> 1.4.0)
   bushido (= 0.0.35)
   bushido_stub (= 0.0.3)
   cancan
@@ -307,7 +308,7 @@ DEPENDENCIES
   haml (= 3.1.2)
   heroku (= 1.19.1)
   highline
-  httparty (>= 0.6.1)
+  httparty (= 0.7.8)
   inherited_resources (~> 1.1.2)
   launchy
   linecache (= 0.43)
diff --git a/app/controllers/admin/base_controller.rb b/app/controllers/admin/base_controller.rb
index c7efd941..048234c7 100644
--- a/app/controllers/admin/base_controller.rb
+++ b/app/controllers/admin/base_controller.rb
@@ -15,6 +15,8 @@ module Admin
 
     before_filter :set_locale
 
+    before_filter :set_current_thread_variables
+
     helper_method :sections, :current_site_url, :site_url, :page_url, :current_ability
 
     # https://rails.lighthouseapp.com/projects/8994/tickets/1905-apphelpers-within-plugin-not-being-mixed-in
@@ -42,6 +44,11 @@ module Admin
 
     protected
 
+    def set_current_thread_variables
+      Thread.current[:admin] = current_admin
+      Thread.current[:site]  = current_site
+    end
+
     def current_ability
       @current_ability ||= Ability.new(current_admin, current_site)
     end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index e4838493..745bb03d 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -65,7 +65,9 @@ class Ability
 
     can :manage, Membership
 
-    cannot :change_role, Membership do |membership|
+    cannot :grant_admin, Membership
+
+    cannot [:update, :destroy], Membership do |membership|
       @membership.account_id == membership.account_id || # can not edit myself
       membership.admin? # can not modify an administrator
     end
@@ -74,7 +76,7 @@ class Ability
   def setup_admin_permissions!
     can :manage, :all
 
-    cannot :change_role, Membership do |membership|
+    cannot [:update, :destroy], Membership do |membership|
       @membership.account_id == membership.account_id # can not edit myself
     end
   end
diff --git a/app/models/account.rb b/app/models/account.rb
index 5e0b6600..b50e9aa3 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -47,12 +47,12 @@ class Account
 
   def remove_memberships!
     self.sites.each do |site|
-      site.memberships.delete_if { |m| m.account_id == self._id }
+      membership = site.memberships.where(:account_id => self._id).first
 
-      if site.admin_memberships.empty?
+      if site.admin_memberships.size == 1 && membership.admin?
         raise I18n.t('errors.messages.needs_admin_account')
       else
-        site.save
+        membership.destroy
       end
     end
   end
diff --git a/app/models/content_instance.rb b/app/models/content_instance.rb
index 0322ff86..527c76ba 100644
--- a/app/models/content_instance.rb
+++ b/app/models/content_instance.rb
@@ -50,6 +50,14 @@ class ContentInstance
   def visible?
     self._visible || self._visible.nil?
   end
+  
+  def next
+    content_type.contents.where(:_position_in_list => _position_in_list + 1).first()
+  end
+  
+  def previous
+    content_type.contents.where(:_position_in_list => _position_in_list - 1).first()
+  end
 
   def errors_to_hash
     Hash.new.replace(self.errors)
diff --git a/app/models/membership.rb b/app/models/membership.rb
index 834c0f53..208e7feb 100644
--- a/app/models/membership.rb
+++ b/app/models/membership.rb
@@ -11,6 +11,7 @@ class Membership
 
   ## validations ##
   validates_presence_of :account
+  validate :can_change_role, :if => :role_changed?
 
   ## callbacks ##
   before_save :define_role
@@ -55,4 +56,18 @@ class Membership
     self.role = Ability::ROLES.include?(role.downcase) ? role.downcase : Ability::ROLES.first
   end
 
+  # Users should not be able to set the role of another user to be higher than
+  # their own. A designer for example should not be able to set another user to
+  # be an administrator
+  def can_change_role
+    current_site       = Thread.current[:site]
+    current_membership = current_site.memberships.where(:account_id => Thread.current[:admin].id).first if current_site.present?
+
+    if current_membership.present?
+      # The role cannot be set higher than the current one (we use the index in
+      # the roles array to check role presidence)
+      errors.add(:role, :invalid) if Ability::ROLES.index(role) < Ability::ROLES.index(current_membership.role)
+    end
+  end
+
 end
diff --git a/app/views/admin/current_site/_form.html.haml b/app/views/admin/current_site/_form.html.haml
index a864df52..cb0426fb 100644
--- a/app/views/admin/current_site/_form.html.haml
+++ b/app/views/admin/current_site/_form.html.haml
@@ -54,11 +54,14 @@
 
         %em.email= account.email
 
-        - if can?(:change_role, membership)
+        - if can?(:update, membership)
           .role
             %em.editable= t("admin.memberships.roles.#{membership.role}")
 
-            = fm.select :role, Ability::ROLES.collect { |r| [t("admin.memberships.roles.#{r}"), r] }, :include_blank => false
+            - if can?(:grant_admin, membership)
+              = fm.select :role, Ability::ROLES.map { |r| [t("admin.memberships.roles.#{r}"), r] }, :include_blank => false
+            - else
+              = fm.select :role, (Ability::ROLES - ['admin']).map { |r| [t("admin.memberships.roles.#{r}"), r] }, :include_blank => false
 
           %span.actions
             = link_to image_tag('admin/form/icons/trash.png'), admin_membership_url(membership), :class => 'remove first', :confirm =>t('admin.messages.confirm'), :method => :delete
@@ -73,4 +76,4 @@
     = f.custom_input :robots_txt, :css => 'code full', :with_label => false do
       = f.label :robots_txt
       %code{ :class => 'html' }
-        = f.text_area :robots_txt, :class => 'small'
\ No newline at end of file
+        = f.text_area :robots_txt, :class => 'small'
diff --git a/config/locales/default.ru.yml b/config/locales/default.ru.yml
index c8d93dd5..58fc5f8b 100644
--- a/config/locales/default.ru.yml
+++ b/config/locales/default.ru.yml
@@ -29,7 +29,7 @@ ru:
           title: "Страница не найдена"
           body: "Содержимое страницы 404"
         other:
-          body: "{% расширяет 'parent' %}"
+          body: "{% extends 'parent' %}"
 
   mongoid:
     attributes:
diff --git a/features/admin/authorization/current_site.feature b/features/admin/authorization/current_site.feature
index 591b6f6b..f16312ab 100644
--- a/features/admin/authorization/current_site.feature
+++ b/features/admin/authorization/current_site.feature
@@ -35,7 +35,7 @@ Background:
     And I should see "Access points"
     And I should not see the role dropdown on myself
     And I should not see the role dropdown on the "admin"
-    And I should see the role dropdown on the "author"
+    And I should see the role dropdown on the "author" without the "Administrator" option
     And I should not see delete on the "admin"
     And I should not see delete on myself
     And I should see delete on the "author"
diff --git a/features/step_definitions/current_site_steps.rb b/features/step_definitions/current_site_steps.rb
index bfb76706..e2dc0545 100644
--- a/features/step_definitions/current_site_steps.rb
+++ b/features/step_definitions/current_site_steps.rb
@@ -1,5 +1,9 @@
 Then /^I should see the role dropdown on the "([^"]*)"$/ do |user|
-  find(:css, "li.membership[data-role=#{user}] select").text.should == 'AdministratorDesignerAuthor'
+  find(:css, "li.membership[data-role=#{user}] select").should be_present
+end
+
+Then /^I should see the role dropdown on the "([^"]*)" without the "([^"]*)" option$/ do |user, option|
+  find(:css, "li.membership[data-role=#{user}] select").text.should_not include option
 end
 
 Then /^I should see the role dropdown on myself$/ do
@@ -33,3 +37,7 @@ end
 Then /^I should not see any delete buttons$/ do
  page.has_css?('li.membership .actions a.remove').should be_false
 end
+
+When /^I select the "([^"]*)" role for the "author" user/ do |role|
+  Given %{I select "#{role}" from "site[memberships_attributes][2][role]"}
+end
diff --git a/features/step_definitions/site_steps.rb b/features/step_definitions/site_steps.rb
index 748d929c..075a451d 100644
--- a/features/step_definitions/site_steps.rb
+++ b/features/step_definitions/site_steps.rb
@@ -5,6 +5,7 @@
 # - I have the site: "some site" set up with name: "Something", domain: "test2"
 #
 Given /^I have the site: "([^"]*)" set up(?: with #{capture_fields})?$/ do |site_factory, fields|
+  Thread.current[:site] = nil
   @site = FactoryGirl.create(site_factory, parse_fields(fields))
   @site.should_not be_nil
 
diff --git a/features/support/selectors.rb b/features/support/selectors.rb
index 32339920..6b5a6bc2 100644
--- a/features/support/selectors.rb
+++ b/features/support/selectors.rb
@@ -22,6 +22,9 @@ module HtmlSelectorsHelpers
       
     when "the has many selector"
       ".has-many-selector ul li.template"
+
+    when 'the role'
+      '.role'
     
     # Add more mappings here.
     # Here is an example that pulls values out of the Regexp:
diff --git a/lib/locomotive/import/content_types.rb b/lib/locomotive/import/content_types.rb
index 4e5feeb3..f2e17000 100644
--- a/lib/locomotive/import/content_types.rb
+++ b/lib/locomotive/import/content_types.rb
@@ -210,7 +210,7 @@ module Locomotive
       end
 
       def set_highlighted_field_name(content_type)
-        field = content_type.content_custom_fields.detect { |f| f._alias == content_type.highlighted_field_name }
+        field = content_type.content_custom_fields.detect { |f| f._alias == content_type.highlighted_field_name.to_s }
 
         content_type.highlighted_field_name = field._name if field
       end
diff --git a/lib/locomotive/liquid/drops/content.rb b/lib/locomotive/liquid/drops/content.rb
index 1aefc759..2e3fcb37 100644
--- a/lib/locomotive/liquid/drops/content.rb
+++ b/lib/locomotive/liquid/drops/content.rb
@@ -8,6 +8,32 @@ module Locomotive
         def _id
           self._source._id.to_s
         end
+        
+        # Returns the next content for the parent content type.
+        # If no content is found, nil is returned.
+        #
+        # Usage:
+        #
+        # {% if article.next %}
+        # <a href="/articles/{{ article.next._permalink }}">Read next article</a>
+        # {% endif %}
+        #
+        def next
+          self._source.next.to_liquid
+        end
+        
+        # Returns the previous content for the parent content type.
+        # If no content is found, nil is returned.
+        #
+        # Usage:
+        #
+        # {% if article.previous %}
+        # <a href="/articles/{{ article.previous._permalink }}">Read previous article</a>
+        # {% endif %}
+        #
+        def previous
+          self._source.previous.to_liquid
+        end
 
         def before_method(meth)
           return '' if self._source.nil?
diff --git a/lib/locomotive/liquid/tags/with_scope.rb b/lib/locomotive/liquid/tags/with_scope.rb
index ea23b339..7f79675d 100644
--- a/lib/locomotive/liquid/tags/with_scope.rb
+++ b/lib/locomotive/liquid/tags/with_scope.rb
@@ -23,9 +23,9 @@ module Locomotive
         def decode(attributes, context)
           attributes.each_pair do |key, value|
             attributes[key] = (case value
-            when /true|false/ then value == 'true'
-            when /[0-9]+/ then value.to_i
-            when /'(\S+)'/ then $1
+            when /^true|false$/i then value == 'true'
+            when /^[0-9]+$/ then value.to_i
+            when /^["|'](.+)["|']$/ then $1.gsub(/^["|']/, '').gsub(/["|']$/, '')
             else
               context[value]
             end)
diff --git a/locomotive_cms.gemspec b/locomotive_cms.gemspec
index d4a3559b..11f824a6 100644
--- a/locomotive_cms.gemspec
+++ b/locomotive_cms.gemspec
@@ -17,12 +17,12 @@ Gem::Specification.new do |s|
   s.required_rubygems_version = '>= 1.3.6'
   s.rubyforge_project         = 'nowarning'
 
-  s.add_dependency 'rails', '>= 3.0.10'
+  s.add_dependency 'rails', '~> 3.0.10'
   s.add_dependency 'warden'
   s.add_dependency 'devise', '1.3.4'
   s.add_dependency 'devise_bushido_authenticatable', '1.0.0.alpha10'
-  s.add_dependency 'mongoid', '2.0.2'
-  s.add_dependency 'bson_ext', '~> 1.3.0'
+  s.add_dependency 'mongoid', '~> 2.0.2'
+  s.add_dependency 'bson_ext', '~> 1.4.0'
   s.add_dependency 'locomotive_mongoid_acts_as_tree', '0.1.5.7'
   s.add_dependency 'will_paginate', '~> 3.0.0'
 
@@ -49,7 +49,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'fog', '0.8.2'
   s.add_dependency 'mimetype-fu'
   s.add_dependency 'actionmailer-with-request'
-  s.add_dependency 'httparty', '>= 0.6.1'
+  s.add_dependency 'httparty', '0.7.8'
   s.add_dependency 'RedCloth', '4.2.8'
   s.add_dependency 'delayed_job', '2.1.4'
   s.add_dependency 'delayed_job_mongoid', '1.0.2'
diff --git a/spec/fixtures/themes/default.zip b/spec/fixtures/themes/default.zip
index 8489be3d..47258673 100644
Binary files a/spec/fixtures/themes/default.zip and b/spec/fixtures/themes/default.zip differ
diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index 1b43d581..237426ae 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -125,6 +125,15 @@ describe Ability do
       end
     end
 
+    context 'granting admin' do
+      it 'should allow only admins to grant admin role' do
+        should     allow_permission_from :grant_admin, @admin
+        should_not allow_permission_from :grant_admin, @designer
+        should_not allow_permission_from :grant_admin, @author
+      end
+
+    end
+
   end
 
 end
diff --git a/spec/models/account_spec.rb b/spec/models/account_spec.rb
index b57d614a..c8f429a8 100644
--- a/spec/models/account_spec.rb
+++ b/spec/models/account_spec.rb
@@ -47,13 +47,14 @@ describe Account do
     end
 
     it 'should also delete memberships' do
-      Site.any_instance.stubs(:admin_memberships).returns(['junk'])
+      Site.any_instance.stubs(:admin_memberships).returns(['junk', 'dirt'])
+      @site_1.memberships.first.expects(:destroy)
+      @site_2.memberships.first.expects(:destroy)
       @account.destroy
-      @site_1.memberships.should be_empty
-      @site_2.memberships.should be_empty
     end
 
     it 'should raise an exception if account is the only remaining admin' do
+      @site_1.memberships.first.stubs(:admin?).returns(true)
       @site_1.stubs(:admin_memberships).returns(['junk'])
       lambda {
         @account.destroy
diff --git a/spec/models/content_instance_spec.rb b/spec/models/content_instance_spec.rb
index f34e2957..9669ab61 100644
--- a/spec/models/content_instance_spec.rb
+++ b/spec/models/content_instance_spec.rb
@@ -42,6 +42,34 @@ describe ContentInstance do
 
   end
 
+  describe "#navigation" do
+    before(:each) do
+      %w(first second third).each_with_index do |item,index|
+        content = build_content({:title => item.to_s})
+        content._position_in_list = index
+        instance_variable_set "@#{item}", content
+      end
+    end
+
+    it 'should find previous item when available' do
+      @second.previous.custom_field_1.should == "first"
+      @second.previous._position_in_list.should == 0
+    end
+
+    it 'should find next item when available' do
+      @second.next.custom_field_1.should == "third"
+      @second.next._position_in_list.should == 2
+    end
+
+    it 'should return nil when fetching previous item on first in list' do
+      @first.previous.should == nil
+    end
+
+    it 'should return nil when fetching next item on last in list' do
+      @third.next.should == nil
+    end
+  end
+
   describe '#permalink' do
 
     before(:each) do