In Maxthon 4, since microsoft changed their login screen for its mircrosft account services, auto fill has been having probelms filling in the email screen. It would leave the username ex there along with your actual credientials. With this being their the login screen recognizes the email as wrong even though it is right. With this problem, it would require you to refill in you email for it to login sucessfully. This has been a problem in MX4 and it still continues. Has anyone experenced this?