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Have you tried clearing your cache, cookies, & history and trying your request again? That's what I do when it happens to me. I don't have any credits available or I would try to duplicate it.
Did you try another computer?
Sounds like cache isn't cleared, OR once in a while I just don't get a click thru on a site, i.e., the application hangs.
other thing it could be is bandwidth bottleneck somewhere with your ISP or elsewhere.
I just close the page and reopen it again, copying the address from my address bar.