diff --git a/trac/htdocs/common/css/trac.css b/trac/htdocs/common/css/trac.css
index ad57bb3..44c6374 100644
--- a/trac/htdocs/common/css/trac.css
+++ b/trac/htdocs/common/css/trac.css
@@ -307,10 +307,6 @@ label.disabled {
 
 #mainnav :link, #mainnav :visited {
     background:url(../dots.gif) 0 0 no-repeat;
-    border-right:1px solid #fff;
-    border-bottom:none;
-    border-left:1px solid #555;
-    color:#000;
     padding:.2em 20px;
     font-weight: bold;
 }
@@ -321,19 +317,18 @@ label.disabled {
 
 #mainnav :link:hover,#mainnav :visited:hover {
     background-color:#ccc;
-    border-right:1px solid #ddd;
 }
 
 #mainnav .active :link,#mainnav .active :visited {
     background:#333 url(../topbar_gradient2.png) 0 0 repeat-x;
-    border-top:none;
-    border-right:1px solid #000;
+
+
     color:#eee;
     font-weight:bold;
 }
 
 #mainnav .active :link:hover,#mainnav .active :visited:hover {
-    border-right:1px solid #000;
+
 }
 
 /* Context-dependent navigation links */