Logo partially hidden

Hi

On the blog detail pages, the logo is partially hidden - see here for an example
http://blatantlyblunt.com/index.php/Hip-Hop/Stream-gangrene-alchemist-oh-no-you-disgust-me.html

I actually have emloyed a developer to help out on my site and he said it looks someone has
messed up a lot of the CSS files of my template and it is impossible to fix the width and height of the logo . he changed it , but other libraries that draw data for the logo image will not accept the changes for some reason.

he noticed that someone set logo image and use CSS instead of being set as the image for logo position on gk_news2 template . He tried to change the icon displayed as ordinary image files,
without CSS, but it breaks the design template

Maybe it has been messed up during the blog update?

any help much appreciated!!!

thanks