If you're an America Online user, you may have noticed that AOL sometimes has trouble displaying Web graphics. This is because AOL rarely shows an actual web page to its members. Usually, it's a copy of the real web site.
Images are copied as well and their file sizes are reduced, which also reduces the quality.
If you use AOL as your browser and you want to view the images as they were intended to be viewed, you'll need to turn the graphics compression off.