I also have the same problem with sites which worked perfectly on mobiles which were produced using 7 premium and on upgrading to MX premium the pages are no longer viewable on my Samsung Galaxy S2 as only the top left of the page appears and cannot be reduced to view the page. I have now reverted my updated sites back to version 7 and will not be using MX until this is fixed, which I hope will be soon as I can't afford to throw my money away on something which is not an improvement over that which I already had.