I'm having a real problem with this. When I first set up my blogs I had to choose the permalink structure 'post ID'. I want to change this, or ideally have the ability to decide on permalinks for a post without the need of altering all of the previous url's of my posts, which is what occurs when I change the site wide permalinks. Unfortunately, because I have post ID as my permalink structure, modifying the web page slug makes no difference to the post url. I know I can change the site permalinks and then do 301 redirects, but these are quite established domains with a great deal of the posts indexed, I Really do not wish to risk losing their index, or ranking?! Cheers