title: What is the difference between "utf8_unicode_ci" and "utf8_unicode_520_ci"
body: <p>I recently upgraded WAMPServer and now in phpMyAdmin, I see both collations <code>utf8_unicode_ci</code> and <code>utf8_unicode_520_ci</code>. I was using "utf8_unicode_ci" for Turkish applications, but I wonder what is different in the new <code>*_520</code> collation?</p>