Formatting glitch

Some weird formatting has appeared on our website in the form of small square boxes floating above the text for the headers “overview,” “schedule,” abstracts” etc. 

It appears on the url noted above https://environmentalhistory.yale.edu/programs/conferences/new-perspecti…

and also here: https://environmentalhistory.yale.edu/programs/conferences/new-perspectives-environmental-history-2018

Seems to have come out of nowhere in the conference template.

Could you fix this?