I've been scratching my head for the last 40 minutes trying to figure out why the logo on the below site is only working in Safari.
The logo should be in the top left. The site is a WordPress site and the code I've used to drag in the logo is here:
<a href="<?php echo get_option('home'); ?>/"><img src="<?php bloginfo('template_directory') ?>/img/logo.png" alt="JR's Hairdressing" title="JR's Hairdressing" /></a>
If you hover over the logo and copy the image link you'll see that the link is correct.
Looks like the image file itself is the issue. Try the normal bad-image troubleshooting stuff: Open and resave it. Make sure it's RGB. Try a gif instead, etc.
Hard to tell what's actually causing the error, but I've found in situations like this simply opening the image in Paint/Photoshop/Gimp, re-saving it and re-uploading usually fixes the problem.