Software: Apache. PHP/5.5.15 

uname -a: Windows NT SVR-DMZ 6.1 build 7600 (Windows Server 2008 R2 Enterprise Edition) i586 

SYSTEM 

Safe-mode: OFF (not secure)

E:\nuevo\htdocs\cumbreclima\wp-includes\js\tinymce\plugins\hr\   drwxrwxrwx
Free 8.81 GB of 239.26 GB (3.68%)
Detected drives: [ a ] [ c ] [ d ] [ e ] [ f ]
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Viewing file:     plugin.js (624 B)      -rw-rw-rw-

/**
 * plugin.js
 *
 * Copyright, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/*global tinymce:true */

tinymce.PluginManager.add('hr', function(editor) {
	editor.addCommand('InsertHorizontalRule', function() {
		editor.execCommand('mceInsertContent', false, '<hr />');
	});

	editor.addButton('hr', {
		icon: 'hr',
		tooltip: 'Horizontal line',
		cmd: 'InsertHorizontalRule'
	});

	editor.addMenuItem('hr', {
		icon: 'hr',
		text: 'Horizontal line',
		cmd: 'InsertHorizontalRule',
		context: 'insert'
	});
});