Logo present in Upfront editing, but broken in real view

Everything with Upfront has been quite amazing so far, I love the new system. However, one little problem.

On my navigation menu, I have a little logo icon for the home button. When I'm editing in Upfront, I can see the .png image just fine. But, when I exit Upfront and view the page normally, I only see the broken link image.

The file is also used on separate parts of the site and it works fine there, it's only the one place on the menu bar.

Anything I can try to fix this?