I've tried to post links to archived webpages that are no longer in existence multiple times here and the forum always screws it up when I post the link either directly or using the link function. I remember having issues with this a few months ago, trying to post a link to an archived version of the old MP School of Rock and then also today when trying to post a link in a thread a minute ago.
Here's the raw URL copy and pasted from my browser:
The link you're posting, when not mangled by our text processor, looks like this:
See how it's really two urls jammed together? We can't handle that correctly. Amarius showed one solution (get rid of the ""). Another solution (perhaps easier) is to create a short link (bit.ly or goo.gl) and post that link instead.