Also, FWIW, I realized that the only site on which I was having this problem is a site on which there aren’t any events on the calendar – it’s just empty. It seems that this fix is going to resolve the problem, regardless, but I just thought I’d add that.
At this point I’m going to close the thread as we’ve got what looks to be a workable interim solution and it would also seem there’s a good chance of a fix being pushed out for Genesis in the near future.
Of course if it does become a lingering problem and anyone here wants to check in and see if it’s one we provide further help with then please don’t hesitate to create a new thread.