WordPress 2.6 introduced an annoying feature called "Post Revisions", which saves each revision of every post when you edit it (after publishing). Since I practice link clustering, you can imagine how many post revisions are sitting in my database right now.


Lester Chan (aka GamerZ) published the solution with "How To Turn Off Post Revision In WordPress 2.6" as well as how to remove the existing post revisions from the database.

Just like the autosave feature, WordPress administrators should have the option in the settings somewhere to enable or disable the post revisions feature, or at least be able to adjust it.