Do you have a lot of TAGs set to your post?
Well WordPress will add a class for each one to your post class-list,
effectively filling your page with a LOT of junk in form of
I find it useless.
So I’ve wrote a WordPress plugin to fix-it.
This home-page just saved itself
77,896 characters (about ~
you can download it from the GitHub repository
and install it manually at your blog, should work on every-version since it uses raw HTML editing :]