MX5 PC Beta 220.127.116.11 - cannot login (in ultra mode) to site with domain login domain\user - 401 UNAUTHORIZED
Not problem connect (in ultra mode) to sites with domain login with early versions MX5
You will not have a valid certificate.
In my case, they work perfectly, Cent-browser, chromiun, Opera, and above all, maxthon 5.1
I have stopped trying because I think there are enough proofs