What do I need to change to supress the URL pop-ups?

I am using audible version 1.5 as a theme. The URLs that pop up when the cursor goes over a picture are pretty useless. They just display the domain part of the URL. So, I'd like to supress them so they don't distract from the album.

What do I do to do that?

I'm learning. Seems this behavior is from SweetTitles. I have removed them from my theme and have the behavior I want.