Thanks for the tip, Somey. Looks like it was an inconsistency in the way my Firefox handled the parentheses. Explorer and Opera did fine with them whether they were hex-encoded in the post or not. Firefox (and I have the latest version for Windows) was inconsistent. Anyway, I edited my post from the hex to the actual paren. My Firefox seems to like that better, even though on mouseover it already showed them decoded in the status bar, even as it would report "not found" for the fetch.
If it doesn't work for you, try it each way by pasting into your address bar.
http://uncyclopedia.org/wiki/Daniel_Brandt_(video_game)Filenaming conventions 101:
People who name files should not use anything other than 0-9, A-Z, a-z, hyphen, period, underscore. All alpha characters are case-sensitive in Linux/Unix. Don't ever use spaces in a filename, even though Windows says it's okay. They might wrap when they shouldn't in email, search-engine listings, etc.