BLOG page error help

So I setup my blog page, made one post, and this shows up above the post.

Warning: getimagesize(home2derek727public_htmlwp-contentuploads201304DOM-black3.jpg) [function.getimagesize]: failed to open stream: No such file or directory in /home2/derek727/public_html/wp-content/themes/metamorphosis/functions/admin-functions.php on line 578

Don’t know what it means, or how to get rid of it
Disclaimer: i have next to 0 knowledge of coding, please explain things. THANK YOU