Index: src/wp-admin/css/common.css
===================================================================
--- src/wp-admin/css/common.css	(revision 29533)
+++ src/wp-admin/css/common.css	(working copy)
@@ -2533,6 +2533,7 @@
 	transition: color .1s ease-in-out, background .1s ease-in-out;
 }
 
+#TB_closeWindowButton:focus .tb-close-icon,
 body.plugin-install-php .tb-close-icon:focus,
 body.plugin-install-php .tb-close-icon:hover,
 body.import-php .tb-close-icon:focus,
Index: src/wp-admin/js/plugin-install.js
===================================================================
--- src/wp-admin/js/plugin-install.js	(revision 29533)
+++ src/wp-admin/js/plugin-install.js	(working copy)
@@ -42,7 +42,10 @@
 		tb_click.call(this);
 
 		$('#TB_title').css({'background-color':'#222','color':'#cfcfcf'});
-		$('#TB_ajaxWindowTitle').html('<strong>' + plugininstallL10n.plugin_information + '</strong>&nbsp;' + $(this).data( 'title' ) );
+		$('#TB_ajaxWindowTitle').html( '<strong>' + plugininstallL10n.plugin_information + '</strong>&nbsp;' + $(this).data( 'title' ) );
+		$('#TB_iframeContent').attr( 'title', plugininstallL10n.plugin_information + ' ' + $(this).data( 'title' ) );
+		$('#TB_closeWindowButton').focus();
+
 		return false;
 	});