Here's the website: http://soundlabrecordingstudio.com/
I have the correct file path and the image is RGB. Any other ideas?
Thanks in advance.
As stated in the comments on the OP, saved in PNGs solved the problem.
My opinion: JPEG encoding was probably incorrect.
Take a look at the source code. Immediately after the tag, <body>you wrote <div id='container'->instead <div id='container'>(without an extra dash). FF is excellent, it corrects automatically. Panic IE.
<body>
<div id='container'->
<div id='container'>