Index: wp-admin/css/wp-admin.css
===================================================================
--- wp-admin/css/wp-admin.css	(revision 22147)
+++ wp-admin/css/wp-admin.css	(working copy)
@@ -1133,6 +1133,23 @@
 	margin: 0 24px 0 0;
 }
 
+::-webkit-validation-bubble-message {
+    background: none;
+    border: none;
+    color: red;
+    font-size: 12px;
+    -webkit-box-shadow: 0 0 0 0;
+    position:absolute;
+    top:-28px;
+    left:200px;
+    width:300px;
+    z-index:9999 !important;
+}
+
+::-webkit-validation-bubble-icon {
+	display: none;
+}
+
 /* screen options and help tabs revert */
 #screen-meta {
 	display: none;