This shows up in the scrollable demo on the top of this page:
http://flowplayer.org/tools/demos/scrollable/index.html So maybe it's a feature? :)
Anyway, here is my (admittedly inelegant) solution. I put this in $(document).ready(function () {:
// initialize scrollable
$(".scrollable").scrollable();
// Hide the left scroll button
$('.scrollerButton .left').hide();
// Put the button back on page when right 'next' arrow clicked
$('.scrollerButton .right').click( function() {
$('.scrollerButton .left').show();
});
Hope this helps!