I do understand the need to reorder urls in the website from time to time, but it would be great both for fans and to maintain search engines usefulness if you could create redirections for the old urls to point to the new ones.
I do know this is generally possible with just configuring the website proxy server so all our old links don't break when pages are reorganized.
I have a Player's Guide to an old product, Shackled City, and some of the links apparently broke during the last website reconfiguration.
Fortunately someone reached me to fix it and I was able to still edit the document and perform the fixes, but some other community material might not be that fortunate.
For example, I had to edit the guide to point:
Please have us into account when configuring your urls!