This posting is to report a bug. I receive an Invalid Certificate dialog box on Maxthon 5.2.4.3000 when trying to view some websites.  My system time and date are correct. I use Maxthon v5.2.4.3000 on Windows XP Professional with Service Pack 3. Three example websites are: https://vivaldi.net/ https://easylist.to/ https://www.cloudflare.com/ The issue may be reproduced by visiting one of the example websites for the first time during the browsing session.