style.css not found.. but is found.. errrrr

Ok, the topic might have you a little confused, as am I.

I was working on the style.css file for my theme, made a few changed to a style, and refreshed the page (as I have been doing all day), and the layout breaks badly and loses all rules in style.css

I try to browse directly to the file and get my 404 page, but I know its there, I am looking at it in my ftp client, and I activated default theme then re-activated my theme (this would not be possible if style.css was not there).

I have made a copy of style.css and placed it in a css folder and linked to that, so my site looks fine, but whats up with my style.css and the blog not finding it?? Im calling it with this code:
<style type=”text/css” media=”screen”>@import url( <?php bloginfo(‘stylesheet_url’); ?> );</style>

and also tried a <link rel=”….. type call aswell.

Has anyone else experienced this before, and if so what causes it??