Poppers were always unchecked when opening the character sheet,
regardless of whether or not they were previously checked. Changing the
container from a fieldset to a div makes the poppers stay
checked/unchecked properly.
Recently the ability tables stopped showing up in 2 columns, instead
always showing up stacked (no matter how wide the character sheet window
is). Changing the tables' box-sizing makes them show side by side again.
Matt Quinn