La recherche d'asso est plus propre au niveau du libellé

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: git://github.com/gregbell/active_admin.git
-  revision: efe5a86968c81fd12244e6c4b6957d93d0a4b7ee
+  revision: ac85139e308d26cc5706e0f431ea07553fff45d5
   specs:
     activeadmin (1.0.0.pre)
       arbre (~> 1.0)

app/assets/stylesheets/lugs.sass

@@ -15,6 +15,8 @@ form#lug_search
   padding-right: 2px
   label
     display: none
+  em.fa
+    color: #258
   input
     border: solid thin #258
     margin-left: -1.5em

app/views/lugs/_search.html.haml

@@ -1,7 +1,8 @@
 = search_form_for @search || Lug.search(params[:q]) do |f|
-  = f.label :name_or_city_or_department_or_related_region_name_or_url_cont
+  = f.label :search, t('.label')
   %em.fa.fa-users
-  = f.search_field :name_or_city_or_department_or_related_region_name_or_url_cont, size: 13,
+  = f.search_field :name_or_city_or_department_or_related_region_name_or_url_cont,
+    id: :q_search, size: 13,
     placeholder: t('.title', entity: Lug.model_name.human)
   = f.button class: :search do
     %em.fa.fa-search

config/locales/fr.yml

@@ -290,6 +290,7 @@ Exemple: `%{daylimit}`"
   lugs:
     search:
       title: Trouve ton %{entity}!
+      label: Recherche
 
   devise:
     sessions: