Index: /trunk/lib/MT/App/CMS.pm
===================================================================
--- /trunk/lib/MT/App/CMS.pm (revision 21)
+++ /trunk/lib/MT/App/CMS.pm (revision 24)
@@ -3536,5 +3536,5 @@
     foreach (@siblings) {
         next if $_->id == $obj->id;
-        return $app->errtrans("No categories with the same name can have the same parent")
+        return $app->errtrans("You can't have two categories with the same name at the same level.")
             if $_->label eq $obj->label;
     }
@@ -6910,5 +6910,5 @@
                                         blog_id => $cat->blog_id });
     foreach (@siblings) {
-        return $app->errtrans("No categories with the same name can have the same parent")
+        return $app->errtrans("You can't have two categories with the same name at the same level.")
             if $_->label eq $cat->label;
     }
@@ -6956,5 +6956,5 @@
                                                 blog_id => $cat->blog_id });
             foreach (@siblings) {
-                return $app->errtrans("No categories with the same name can have the same parent")
+                return $app->errtrans("You can't have two categories with the same name at the same level.")
                     if $_->label eq $cat->label;
             }
@@ -9108,5 +9108,5 @@
                                         blog_id => $app->param('blog_id') });
     foreach (@siblings) {
-        return $app->errtrans("No categories with the same name can have the same parent")
+        return $app->errtrans("You can't have two categories with the same name at the same level.")
             if $_->label eq $cat->label;
     }