Your JPEG file is using a format the decoder in the browser can't handle. Apparently you are using an Adobe product and have saved the image using a different colorspace than normal JPEG files.
And some constructive criticism, you're really wasting bandwidth saving such as simple images as a 20k JPEG. Save it as a GIF or PNG instead, 256 colors, or if you really want, as a 24-bit PNG. But a 20k JPEG is practically an oxymoron.
Perl / MySQL / HTML+CSS