My mistake. Those images are not actually missing, but as you slowly pull the scrollbar down after loading a new page, the four featured images are not painted at first, and then about when the bottom menu comes into view, the four featured images in the middle of the page are suddenly painted, not a bad effect once you understand it.
BTW, progress is good on the fledgling web site we are developing with Clovemix theme:
http://nanuet-westnyackrotary.org/
