Ticket #8729: local-upgrade-hint.diff

wp-admin/wp-admin.css

@@ -1 @@
-
 textarea,
 input,
 select {
@@ -2922 +2921 @@
         margin-top: 8px;
 }
 
+form.upgrade .hint {
+        font-style: italic;
+        font-size: 85%;
+        margin: -0.5em 0 2em 0;
+}
+
 #poststuff .inside .the-tagcloud {
         margin: 5px 0 10px;
         padding: 8px;

wp-admin/update-core.php

@@ -13 +13 @@
         wp_die(__('You do not have sufficient permissions to update plugins for this blog.'));
 
 function list_core_update( $update ) {
+    global $wp_local_package;
         $version_string = 'en_US' == $update->locale ?
                         $update->current : sprintf("%s&ndash;<strong>%s</strong>", $update->current, $update->locale);
         $current = false;
@@ -50 +51 @@
                 else
                         echo '<input id="undismiss" class="button" type="submit" value="' . attribute_escape(__('Bring back this update')) . '" name="undismiss" />';
         echo '</p>';
+        if ( 'en_US' != $update->locale && ( !isset($wp_local_package) || $wp_local_package != $update->locale ) )
+            echo '<p class="hint">'.__('This localized version contains both the translation and various other localization fixes. You can skip upgrading if you want to keep your current translation.').'</p>';
         echo '</form>';
 
 }