Thank you so much! Yes, url_rewriting was set to Disabled, which is strange because I remember following every single step correctly...anyways, thanks a lot!!

I set up a Serendipity blog today and there's a link to the admin interface that doesn't work (links to /~mpete16/blog/admin, returns 404) so I have to manually type /~mpete16/blog/serendipity_admin/, and in the admin interface the CSS files are not to be found either. I've searched around and I thi...