Firefox updates the inner <span id='update_me'>, and IE updates the outer one.
I figured it out, but I'm keeping it a secret because I want to be the only one who knows how to do it.
Oooh, okay, read this: http://johnvey.com/features/deliciousdirector/web-service-broker.html
Then do this:
function update_grinder(sauce) { var grinder = $('grinder'); grinder.src='javascript:void(function(){'+sauce+'}())'; }