I came across a case-sensitive URL recently while subbing a feature for one of our print publications. Here it is:
If you change any of the upper-case letters in the address to lower-case (or vice versa), the page won't load. How strange.
We wanted to list the URL in the feature, but not only did it break house style, I thought it might confuse some of our readers. We could have put a note explaining that the URL was case-sensitive - but that seemed a bit ridiculous.
In the end we used a URL-shortening service (such as Tiny.cc) to come up with a new, case-insensitive URL, and listed that in the feature instead.
Oh, here's some information about case-sensitive URLs.
11 hours ago