Problem: The animated GIF is too large. In my case it was too wide for the sidebar of a blog I was updating.
Solution: Although you can resize the animated GIF using a variety of programs, such as GIMP, and at http://www.gifworks.com/index.php, I found that the highest quality reproduction was made by Photoshop. I used a realtively old version, Photoshop Elements 3.0. After resizing the image, you must tell Photoshop you want to save it as a GIF, check the animate box, and pick a frame delay. The first time I tried it the frame delay was set to 0.2 seconds and the GIF raced through the images.