#43 set_on_show loses some bars on IE reload

[Anonymous]

I have setup
$bar = new bar_cylinder();
$bar->set_on_show(new bar_on_show('fade-in', 1, 2));
It works nicely, but there is problem with reload on IE.
On IE browser when refreshing the page it loses/hides few bars. If you move the mouse over the bars appear. Strange behaviour.
Firefox works ok.