Web troubleshooting needed

So, I uploaded an image to the polycamp server. It isn't used in any of the webpages or anything like that, but I need PayPal to be able to access it.

*snip a whole bunch of stuff*

When I upload text changes, they propagate immediately. So why isn't this? Is there something important I'm missing?

Thanks for your input everyone. With your assistance I was able to fix it. Yay!