I have the same issue with two of my X10s (2 of 5 have this issue). I've tried IE, FF, Chrome with no differences, also tried from a linux system with no luck. If I manually change the website address from login.php to miner.php, it allows you to see the miner's stats. But you can't change any settings in there.

I haven't tried reflashing the SD card yet. But they are running the latest version that Baikal released on Jan 1st.