pics not showing

hi , on the page below there is this pics gallery.
as the pics were loading not very fast, or not at all, ive installed: Lazy Load XT
but still, the page is opening, and it looks like the pics are loading, but they are not showing.
what do you see ? look at the pic below.
its stay white with at the background vaguely the thumbs visible.
you wait and wait, and ONLY when you go scrolling down and up again all the thumbs appear!
strange…and not what i want.
what is happening here?

regards, jelle