Symptoms: My JPEG image shows in FF/Chrome, but it doesn't show in IE??
If you have that issue, there is a simple fix. Try to resave your image using photoshop or other photo editing softwares in RGB color mode.
The reason is sometimes your image is in CYMK color code, which won't be understood by IE. Because IE so far only understand RGB, and CYMK is a print format, not really for web.
For people who are using photoshop, when you save your image, use the "save for web" options.