No space between attributes

I’m not sure because the way you’re showing your code may be corrupting it (use the “code” and “/code” tags around it, but if what I’m seeing is what you’re actually using, I think it should be:

<h1 id="site-title" rel="home"><span><img src="<?php echo bloginfo('stylesheet_directory');?>/images/company_logo.png" alt="<?php bloginfo( 'name' ); ?>" width="388" height="63" /></span></h1>