Gallery theme slideshow slide picker has disappeared

The little circles under the home page slide show in the Gallery Theme have disappeared.

I tried using Firebug to delete all the DOM elements that could possibly be on top of them, but they're still nowhere to be found.

The only thing I can do to make them appear again is to change their position so that they show up on top of the slideshow itself. The moment they go out of the slideshow, they slip into oblivion! Any suggestions on how to get these links to show up again?

They disappeared after I changed the background color of the #container element. However, removing the background color isn't fixing it!

Thanks in advance.