diff --git a/trac/htdocs/libcaca.css b/trac/htdocs/libcaca.css
index f2027e4..3c4d7d3 100644
--- a/trac/htdocs/libcaca.css
+++ b/trac/htdocs/libcaca.css
@@ -660,6 +660,9 @@ table.listing tbody td.new_replies {
 .message-list div.replies,
 .message-list div.replies.new,
 .message-list div.topic.new {
+    -moz-border-radius: 5px;
+    -webkit-border-radius: 5px;
+    border-radius: 5px;
     border: 1px solid #2C1F1C;
     background-color: #C1CFE5;
 }