@ossobuco,
A little more detail will probably help with diagnosis and problem solving. For instance:
Operating system:
Browser, browser version:
Using ad blocking programs? If so, which?
Anything peculiar stand out on the pages that aren't loading properly? For instance do those pages have images or youtubes on them?
Does the problem happen on other sites you visit or just this one?
There have been quite a few updates to operating system, browser, java and flash software in the last few weeks. Are all your programs up to date? Any coincidence in the timing of those updates being installed and the A2K site going wonky?