I agree wholeheartedly with samboll.
I just finished working with the Kubrick theme and will be smart enough to not touch that theme again/use it as a base theme if at all possible. Great theme if you never need to alter it and great functionality, too, if you’re using WP for just simple blogging but YIKES. Not recommended for the first-time WP themer who doesn’t do front-end coding.
To change the header, you need to change this line of coding in the default css:
#header {
background: #73a0c5 url('images/kubrickheader.jpg') no-repeat bottom center;
}
Keep the ‘no-repeat’ as it will keep the header image from repeating itself and the ‘bottom’ and ‘center’ will position the header where you need it to be – for example, ‘top center’ or ‘top right’.
… But you also might need to change the PHP coding in the functions.php page if I’m not mistaken because if you don’t, the coding on that page will override any and all changes you might make to the css file or the other php files.
Exactly which line or lines of coding I can’t be sure because when I used Kubrick, I ended up just wiping the functions.php file clean and rewrote my own necessary PHP code that didn’t redundantly spit out basically what my CSS and XHTML was supposed to spit out.