There is one image - a delightful close-up of a jar of Vegemite - that is truly enormous. When you load this page, the whole thing side-scrolls while the graphic is loading, since it is far too wide for any browser window. However, if you just wait a moment for the graphic to load, the system shrinks it down to an appropriate width and all looks normal again.
Just to clarify that the image won't shrink down if you have "Keep original size" selected for your image resize mode in your control panel. I'd forgotten I'd set that, and was trying to figure out why that pic wasn't shrinking for me.