Logo will not display

I have attemted uploading a logo, and it will not display. The Logo checkbox is turned on in the configuration, and it displays fine in other themes, but will not display in Andreas09. I'm assuming this is a bug because as I understand it, phptemplate themes are supposed to have options configurable in the admin panels without having to modify code. If this is by design rather than by accident, is it difficult for me to modify the theme as a non-php-coder? (i.e. could you give me a few lines of code to paste into a template file at a certain position?) I've modified php files using common sense before, but I have no knowledge of programming in php myself.