Embedded Facebook Like-Box won't let me style

I am trying put place a Facebook Like-Box on a page on my site, and then style it via my own CSS (chiefly to increase the height awarded to div#stream_content. (The idea is to have the FB feed act as a news feed, but I don't want the user to have to scroll to see more the top two items or so as it does by default).

I have read and experimented with suggestions from these articles and more: http://stackoverflow.com/questions/4064038/customizing-facebook-like-box,
http://www.daddydesign.com/wordpress/how-to-customize-your-facebook-fan-box/,
http://hitech-tips.blogspot.com/2010/05/facebook-like-button-xfbml-tutorial.html

I am going the FBML route (rather than using an iframe) as I gather is required for applying a cross-domain stylesheet. I gather also that I need this doctype declaration for my webpage:
<!doctype html lang="en" xmlns:fb="http://www.facebook.com/2008/fbml" xml:lang="en">

So then I have this in the body of the page:

    <div id="fb-root"></div><script src="http://connect.facebook.net/en_US/all.js#xfbml=1"></script>
    <fb:like-box
            profile_id="***my ID here***" 
            width="450"
            height="600"
            colorscheme="dark"
            show_faces="false"
            stream="true"
            header="false"
            logobar="0"
            css="http://***my domain here***/css/FBstyles.css?1"
            href="http://www.facebook.com/***my page name here***"
    ></fb:like-box>

But I still get these sorts of errors: "(4) Unsafe JavaScript attempt to access frame with URL ...(my webpage)...from frame with URL http://www.facebook.com/plugins/likebox.php?channel=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%3Fversion%3D2%23cb%3Dfd907a0e%26origin...blahblahblah. Domains, protocols and ports must match."

Where am I screwing up?

I went this route too. Although you are using FBML, the actual embedded code ends up being an iframe anyway. (you can see it in the DOM with an HTML inspector after it loads). About the only thing I was able to do was put it in a div with a colored background, since the iframe is transparent, and a border.

You are probably getting errors since the javascript on the Facebook server is trying to access the CSS on your server. I didn't think you could do this.

EDIT:

In the StackOverflow link you provided, the posted answers clearly state that using your own CSS only works with a "Fan" box, not with a "Like" box.