Categories and link categories
These two items should be unconnected as one is categories of content and the other is categories of website links. I recently added some link categories which had similar names to content categories. I then revised the link category names and somehow the content categories where changed. I renamed the link categories back to their original names which were the same as the content category names (but it wouldn’t let me change some of them and the ones I did manage to change have not been properly updated because the category cloud has their old names and if you click on them they report a 404 error.
The affected categories on my blog (lifeover30.wordpress.com) are: