Have the MTU requirements been updated lately by Xbox live? I tried to get onto my account today and received an error that the MTU settings were not correct and needed to be at least 1364. I checked my router and it's set to 1500, checked again, same error, so I tried pluggin the xbox directly into the modem and got the same error. I already called my ISP and they informed one they had one other person complain of the same thing today, that every other internet device works but their xbox cannot connect either. So I'm just trying to narrow the problem down and confirm it's a problem with my ISP and not an Xbox Live problem.