Index: app/views/users/_contact_preferences.html.erb
===================================================================
--- app/views/users/_contact_preferences.html.erb	(revision 0)
+++ app/views/users/_contact_preferences.html.erb	(working copy)
@@ -0,0 +1,5 @@
+<p id="contact-form-check-box" >
+  <%= label_tag('pref[contact_form]', l(:field_contact_form)) %>
+  <%= hidden_field_tag('pref[contact_form]', 0, :id => nil) %>
+  <%= check_box_tag('pref[contact_form]', 1, user.pref.contact_form) %>
+</p>
Index: lib/contact_hook.rb
===================================================================
--- lib/contact_hook.rb	(revision 60)
+++ lib/contact_hook.rb	(working copy)
@@ -2,8 +2,13 @@
 
     render_on :view_account_left_bottom, :partial => 'users/show'
 
-    render_on :view_users_form, :partial => 'users/contact'
-    render_on :view_my_account, :partial => 'users/contact'
+    if Redmine::VERSION::MAJOR >= 3 || (Redmine::VERSION::MAJOR >= 2 && Redmine::VERSION::MINOR >= 4)
+      render_on :view_users_form_preferences, :partial => 'users/contact_preferences'
+      render_on :view_my_account_preferences, :partial => 'users/contact_preferences'
+    else
+      render_on :view_users_form, :partial => 'users/contact'
+      render_on :view_my_account, :partial => 'users/contact'
+    end
 
     if defined?(ChiliProject) && ChiliProject::VERSION::MAJOR >= 3
         render_on :view_layouts_base_body_bottom, :partial => 'contact_form/chiliproject'