Resorting to all sorts of convoluted attempts (such as opening a previous CS5 animated GIF) was able to make it PLAY in Photoshop CS6. Then had to File>Save for Web> HTML and Images to desktop, then dragged GIF file to site root folder to insert and play in http://www.josephdenaro.com/heads/indexmobile.html
Still furious and disgusted with Adobe for \crapping up// simple animated GIF.
First animated GIF circa 2000 was created in Fireworks. Thereafter. Photoshop had back-end/affiliated Image Ready program to create animated GIFs. When they dropped Image Ready a couple of version back, it was under Window>ANIMATION in Phitoshop. In version CS6, its Window>TIMELINE.