This is really odd. I'm looking at my clients' 404 monitor which is using SEO Ultimate and I'm really puzzled by it. In it, it has a slew of 404's from style.css files from the default theme. Which is odd because I'm not using the default theme. For example, this:
http://mysite.com/2011/10/theme/default/style.css
So it sees the style.css like it's a post, but it's not. It's not even the right way to get to it. I don't get this at all and there are supposedly 404's coming from all over the place. Why would this be happening?