I've upgraded from 3.3.2 to 3.3.3 and my header images no longer rotate as they use to. I have around 30 images in the images/header/ folder and a click of any link would randomly display one of the new header images.
With the upgrade you can click a link, hit refresh, CTRL+refresh and you get the same image. I've tested in IE8 and Chrome and have no script errors. I blew away my Wordpress install and did a full new install and still the images do not rotate.
Please understand I am not looking to rotate my images every few seconds, but to randomly grab one of the 30 images I have with the click of any link like version 3.3.2 use to work.