"For older bills, it was because of the Eurion constellation, which is an order of dots that appears on pretty much every major currency. Today, there’s a new counterfeit deterrence system which includes the Eurion constellation but also has other mysterious forces at work."

Anything to stop counterfeiting. And yes, this page I can comment on. 

I did everything the same, including copying/pasting a comment after posting. The only difference I can see is the address (this one starts with "sploid") but the link wasn't really the problem.

Maybe the problem was that picture?

I uploaded it as a saved image, 800x450px.  

Yeah but if it's a broken image somewhere in the bits of the image it could mess up the page. 

That would be my guess. Sometimes images look ok but they're broken internally.