diff --git a/trac/htdocs/common/css/trac.css b/trac/htdocs/common/css/trac.css
index 47a3cdd..e663a97 100644
--- a/trac/htdocs/common/css/trac.css
+++ b/trac/htdocs/common/css/trac.css
@@ -310,8 +310,8 @@ label.disabled {
 
 /* Main navigation bar */
 
-#mainnav {
-    background:#945973 url(../topbar_gradient.png) 0 0;
+#mainnav { /*url(../topbar_gradient.png)*/
+    background:#945973  0 0;
     font:normal 1em verdana,'Bitstream Vera Sans',helvetica,arial,sans-serif;
     margin:.66em 0 .33em;
     padding:.2em 0;