I have two groups of tech folks looking into this...its weird because the work we do on design changes is done offline, and then brought over all at once...the front page and story pages do not seem affected...we're on it.
Not sure if it has something to do with the five ads that we recently removed (yes, we did that two days ago

and if that 'void' created a coding issue...but it hasn't been a problem the last two days.