diff --git a/TODO b/TODO
index d1bd88d..239e9b5 100755
--- a/TODO
+++ b/TODO
@@ -1,3 +1,7 @@
+* Check database creation in install.php
+* Don't display the whole balance table if not admin
+
+
 Improvements :
 ==============
 * User groups
diff --git a/index.php b/index.php
index 6e30e8c..90ce2c0 100644
--- a/index.php
+++ b/index.php
@@ -10,11 +10,9 @@
         'negative_amount'=>array('fr'=>'Montant négatif non autorisé.', 'en'=>'Negative amount not allowed.'),
         'template_error'=>array('fr'=>'Template non disponible.', 'en'=>'Template not available.'),
         'unauthorized'=>array('fr'=>'Vous n\'avez pas le droit de faire cette action.', 'en'=>'You are not authorized to do that.'),
-        'no_users'=>array('fr'=>'Vous devez ajouter au moins un autre utilisateur.', 'en'=>'You must add at least one more user beside you.')
-    );
-
-    $localized = array(
-        'guest'=>array('fr'=>'invité', 'en'=>'guest')
+        'no_users'=>array('fr'=>'Vous devez ajouter au moins un autre utilisateur.', 'en'=>'You must add at least one more user beside you.'),
+        'what_unknown,'=>array('fr'=>'Vous devez renseigner un objet pour la dépense.', 'en'=>'You must add something to describe this invoice in "what" field.'),
+        'incorrect_amount'=>array('fr'=>'Montant incorrect ou nul.', 'en'=>'Incorrect amount or amount is zero.')
     );
 
     // Include necessary files
@@ -150,6 +148,8 @@
             }
             $tpl->assign('connection', true);
             $tpl->assign('user_post', (!empty($_POST['login'])) ? htmlspecialchars($_POST['login']) : '');
+            if(!empty($error))
+                $tpl->assign('error', $error);
             $tpl->assign('token', generate_token('connection'));
             $tpl->draw('connection');
             break;
@@ -517,6 +517,12 @@
             $tpl->assign('amount_post', (!empty($amount) ? (float) $amount : 0));
             $tpl->assign('what_post', (!empty($what) ? htmlspecialchars($what) : ''));
             $tpl->assign('users', secureDisplay($users_list));
+
+            if(empty($_POST['what']))
+                $tpl->assign('error', $errors['what_unknown'][LANG]);
+            if((float) $_POST['amount'] == 0)
+                $tpl->assign('error', $errors['incorrect_amount'][LANG]);
+
             $tpl->assign('users_in', (!empty($users_in) ? $users_in : array()));
             $tpl->assign('id', (!empty($_GET['id']) ? (int) $_GET['id'] : 0));
             $tpl->assign('token', generate_token('new_invoice'));
diff --git a/tpl/default_en/css/style.css b/tpl/default_en/css/style.css
index 1329c95..a6d6d2d 100644
--- a/tpl/default_en/css/style.css
+++ b/tpl/default_en/css/style.css
@@ -39,7 +39,7 @@ table {
 }
 
 table td, table th {
-    padding: 0.5em;
+    padding: 0.75em;
     border: 1px solid black;
 }
 
@@ -135,6 +135,10 @@ input[type=submit] {
     text-align: center
 }
 
+#connexion_form .label-block {
+    width: 150px;
+}
+
 #edit_password_form, #edit_user_form, #invoice_form, #notice_form, #global_payback_form {
     width: 67%;
     margin: auto;
diff --git a/tpl/default_en/js/main.js b/tpl/default_en/js/main.js
index cc4fb3c..1cbe41d 100644
--- a/tpl/default_en/js/main.js
+++ b/tpl/default_en/js/main.js
@@ -44,6 +44,26 @@ function toggle_password(id) {
         document.getElementById(id).type = 'password';
 }
 
+function payback_nobody() {
+    var users = document.getElementById('global_payback_form').getElementsByClassName("users_in");
+
+    for(var index = 0; index < users.length; index ++) {
+        users[index].checked = false;
+    }
+
+    return false;
+}
+
+function payback_everybody() {
+    var users = document.getElementById('global_payback_form').getElementsByClassName("users_in");
+
+    for(var index = 0; index < users.length; index ++) {
+        users[index].checked = true;
+    }
+
+    return false;
+}
+
 $(document).ready(function() {
     $('#balance_table td, #global_paybacks_table td').hover(function() {
         $(this).closest('tr').find('td,th').addClass('highlight_td');
diff --git a/tpl/default_en/manage_paybacks.html b/tpl/default_en/manage_paybacks.html
index f16ed44..d4be02b 100644
--- a/tpl/default_en/manage_paybacks.html
+++ b/tpl/default_en/manage_paybacks.html
@@ -31,9 +31,10 @@
         <fieldset>
             <legend>Users to include</legend>
             {loop="$users"}
-                <input type="checkbox" id="users_in_{$value->getId()}" name="users_in[]" value="{$value->getId()}"/>
+                <input type="checkbox" id="users_in_{$value->getId()}" name="users_in[]" class="users_in" value="{$value->getId()}" checked="checked"/>
                 <label for="users_in_{$value->getId()}">{$value->getDisplayName()}</label><br/>
-            {/loop}
+            {/loop}<br/>
+            Select : <a href="" onclick="return payback_nobody();">Nobody</a> / <a href="" onclick="return payback_everybody();">Everybody</a>
     </fieldset>
     <p>
         <input type="submit" onclick="return confirm('You are going to add a global payback which includes the selected user. Confirm ?');" value="Confirm"/>
diff --git a/tpl/default_fr/css/style.css b/tpl/default_fr/css/style.css
index 1329c95..a6d6d2d 100644
--- a/tpl/default_fr/css/style.css
+++ b/tpl/default_fr/css/style.css
@@ -39,7 +39,7 @@ table {
 }
 
 table td, table th {
-    padding: 0.5em;
+    padding: 0.75em;
     border: 1px solid black;
 }
 
@@ -135,6 +135,10 @@ input[type=submit] {
     text-align: center
 }
 
+#connexion_form .label-block {
+    width: 150px;
+}
+
 #edit_password_form, #edit_user_form, #invoice_form, #notice_form, #global_payback_form {
     width: 67%;
     margin: auto;
diff --git a/tpl/default_fr/edit_users.html b/tpl/default_fr/edit_users.html
index 908de54..39d5ed1 100644
--- a/tpl/default_fr/edit_users.html
+++ b/tpl/default_fr/edit_users.html
@@ -17,7 +17,7 @@
         <td>{$value->getId()}</td>
         <td>{$value->getLogin()}</td>
         <td>{$value->getDisplayName()}</td>
-        <td>{$value->getAdmin() ? "Yes" : "No"}</td>
+        <td>{$value->getAdmin() ? "Oui" : "Non"}</td>
         <td><a href="index.php?do=edit_users&user_id={$value->getId()}">Modifier</a></td>
         <td>{if condition="$value->getId() != $current_user->getId()"}<a href="index.php?do=delete_user&amp;user_id={$value->getId()}&amp;token={$token}">Supprimer</a>{/if}</td>
     </tr>
@@ -60,7 +60,7 @@
 <form method="post" action="index.php?do=password" id="edit_password_form">
     <p><label for="password" class="label-block">Nouveau mot de passe : </label><input type="password" id="password" name="password"/> <a href="" onclick="toggle_password('password'); return false;"><img src="img/toggleVisible.png" alt="Afficher / Masquer"/></a></p>
     <p><label for="password_confirm" class="label-block">Confirmation : </label><input type="password" id="password_confirm" name="password_confirm"/> <a href="" onclick="toggle_password('password_confirm'); return false;"><img src="img/toggleVisible.png" alt="Afficher / Masquer"/></a></p>
-    <p class="center"><input type="submit" value="Update"/><input type="hidden" name="token" value="{$token}"</p>
+    <p class="center"><input type="submit" value="Enregistrer"/><input type="hidden" name="token" value="{$token}"</p>
 </form>
 
 <h2>Votre jeton de connexion à l'API</h2>
diff --git a/tpl/default_fr/index.html b/tpl/default_fr/index.html
index c82bb84..cce237f 100755
--- a/tpl/default_fr/index.html
+++ b/tpl/default_fr/index.html
@@ -58,9 +58,9 @@
                         {loop="$value->getUsersIn()->get()"}
                             {$users[$key2]->getDisplayName()}
                             {if condition="$value2 > 1"}
-                                ({$value2} guests)
+                                ({$value2} invités)
                             {elseif condition="$value2 == 1"}
-                                ({$value2} guest)
+                                ({$value2} invité)
                             {/if}
                             {if condition="$value1->getBuyer() != $key2"}
                                 - 
diff --git a/tpl/default_fr/js/main.js b/tpl/default_fr/js/main.js
index 1ae056d..dd84517 100644
--- a/tpl/default_fr/js/main.js
+++ b/tpl/default_fr/js/main.js
@@ -44,6 +44,26 @@ function toggle_password(id) {
         document.getElementById(id).type = 'password';
 }
 
+function payback_nobody() {
+    var users = document.getElementById('global_payback_form').getElementsByClassName("users_in");
+
+    for(var index = 0; index < users.length; index ++) {
+        users[index].checked = false;
+    }
+
+    return false;
+}
+
+function payback_everybody() {
+    var users = document.getElementById('global_payback_form').getElementsByClassName("users_in");
+
+    for(var index = 0; index < users.length; index ++) {
+        users[index].checked = true;
+    }
+
+    return false;
+}
+
 $(document).ready(function() {
     $('#balance_table td, #global_paybacks_table td').hover(function() {
         $(this).closest('tr').find('td,th').addClass('highlight_td');
diff --git a/tpl/default_fr/manage_paybacks.html b/tpl/default_fr/manage_paybacks.html
index 082cbb3..0200baa 100644
--- a/tpl/default_fr/manage_paybacks.html
+++ b/tpl/default_fr/manage_paybacks.html
@@ -31,9 +31,10 @@
         <fieldset>
             <legend>Utilisateurs à inclure</legend>
             {loop="$users"}
-                <input type="checkbox" id="users_in_{$value->getId()}" name="users_in[]" value="{$value->getId()}"/>
+                <input type="checkbox" id="users_in_{$value->getId()}" name="users_in[]" class="users_in" value="{$value->getId()}" checked="checked"/>
                 <label for="users_in_{$value->getId()}">{$value->getDisplayName()}</label><br/>
-            {/loop}
+            {/loop}<br/>
+            Sélectionner : <a href="" onclick="return payback_nobody();">Personne</a> / <a href="" onclick="return payback_everybody();">Tout le monde</a>
     </fieldset>
     <p>
         <input type="submit" onclick="return confirm('Vous êtes sur le point d\'ajouter un remboursement global incluant les utilisateurs sélectionnés.');" value="Valider"/>