UPDATE: I tried using the Genesis Responsive Slider. Same problem. So this is obviously a Legacy 1.3 (HTML5 update) theme issue.
Even when I turn off HTML5 in functions.php, I get the same issue.
I have to assume that there is a bug somewhere in Legacy 1.3.
I wonder where I can find the previous ver. of Legacy. Maybe it is on the Studio Press site? I can’t put the 1.3 theme on a client site the way it is now. I hope Wes can/will fix this ASAP.