diff --git a/trac/htdocs/css/timeline.css b/trac/htdocs/css/timeline.css
--- a/trac/htdocs/css/timeline.css
+++ b/trac/htdocs/css/timeline.css
@@ -14,12 +14,6 @@
  line-height: 1.3em;
  margin-left: 1em;
 }
-dl.unread { 
- margin-left: 0.38em;
- border-left: 0.31em solid #c0f0c0;
- padding-left: 0.31em;
-}
-
 dt { background: 3px 4px no-repeat; padding: 0 }
 dt :link, dt :visited {
  background: 3px 3px no-repeat;
@@ -58,6 +52,8 @@
 dt.milestone, dt.milestone a { background-image: url(../milestone.png) !important }
 dt.attachment, dt.attachment a { background-image: url(../attachment.png) !important }
 
+dt.unread { font-weight: bold; }
+
 /* styles for the 'changeset_long_messages' option */
 dd.changeset p { margin: 0; padding: 0 }
 dd.changeset ul { padding-left: 15px; }