Index: django/contrib/admin/media/css/base.css
===================================================================
--- django/contrib/admin/media/css/base.css	(revision 16467)
+++ django/contrib/admin/media/css/base.css	(working copy)
@@ -509,12 +509,14 @@
     color: #666;
     background: #ffc url(../img/admin/icon_success.gif) 5px .3em no-repeat;
 }
-
-ul.messagelist li.warning{
+ul.messagelist li:first-letter {
+    text-transform: uppercase;
+}
+ul.messagelist li.warning {
     background-image: url(../img/admin/icon_alert.gif);
 }
 
-ul.messagelist li.error{
+ul.messagelist li.error {
     background-image: url(../img/admin/icon_error.gif);
 }