Dave Winer’s RSS source namespace has changed from:

http://source.smallpict.com/2014/07/12/theSourceNamespace.html

To:

http://source.scripting.com/

So better update your feeds if you use it.

Neither namespaces are listed on the W3C RSS Validator namespace list, but it also hasn’t been updated for more than a decade. The good news is our feeds no longer fail validation if they don’t have the superfluous, self-referencing atom link.