My information is not entirely correct. It seems that the lists.kde.org server was down at that time. Now works! ;-)
Your note this difference if the link goes to lists.kde.org or mail.kde.org/pipermail.
There is a redirect in place, so you shouldn't ever be getting the old url. I checked with a sysadmin, and he and I consistently get the redirected pages, so it's a mystery. Sorry.