Index: wp-content/themes/twentythirteen/style.css
===================================================================
--- wp-content/themes/twentythirteen/style.css	(revision 23945)
+++ wp-content/themes/twentythirteen/style.css	(working copy)
@@ -937,7 +937,8 @@
 	top: 1px;
 }
 
-.site-header .searchform [type="search"] {
+.site-header .searchform [type="search"],
+.site-header .searchform [type="text"] {
 	background-color: transparent;
 	background-image: url(images/search-icon.png);
 	background-position: 5px center;
@@ -954,7 +955,8 @@
 	width: 0;
 }
 
-.site-header .searchform [type="search"]:focus {
+.site-header .searchform [type="search"]:focus,
+.site-header .searchform [type="text"]:focus {
 	background-color: #fff;
 	border: 2px solid #c3c0ab;
 	cursor: text;
@@ -3185,7 +3187,8 @@
 	(-webkit-min-device-pixel-ratio: 1.25),
 	(min-resolution: 120dpi) {
 
-	.site-header .searchform [type="search"] {
+	.site-header .searchform [type="search"],
+	.site-header .searchform [type="text"] {
 		background-image: url(images/search-icon-2x.png);
 	}