Ok, I went through all of my addons, but it doesn't seem to make a difference.  However, I can't seem to open their page at all now, I doubt it's from your suggestion to disable addons, but just wanted to mention that.

I did get another saved page to open: http://www.renderosity.com/mod/bcs/?ViewProduct=75046 , but it's super slow to load and the promo images at the bottom show broken links, the promos to the right are ok.

What it almost feels like is the page isn't being cached and it's reloading from scratch, as if I had cleared the cache with shift-F5, because the images that do load will completely reload as soon as I open the page, instead of showing up instantly.

I know I'm having a slight speed issue today (stupid ISP), but even on slow days I've never experienced this and so far, it's only been confined to the Marketplace.  Not sure if that helps, but that's what I've noticed.