I observed that whenever I create new posts in my blog: http://leptokurtosis.blogspot.com, the title of the post is contained in the url of the post once published. Can I still change the url (is this the same as permalink?) of previously published posts? I just noticed that even though I change the title of a published post, the url of the post stays the same (contains the first original title of that post).
also, i seem to have an error when i try CSS-validating my blog: http://leptokurtosis.wordpress.com/css-validation-error/. I'm not a very technical person. I dont know how to fix this error. Does the error affect the crawlability of my site (for googlebot)? Thanks so much and more power!