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This makes no sense to me. It assumes that I'll attach the icon to it's own HTML element because it sets the width and height explicitly. Adding icons to your links won't work this way.

Generating useful sprites is much harder than this guy thinks IMHO.

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Sprites are used for a lot more than just adding icons to links.

Adding icons to links was just one example. If you're coding semantic correct HTML you very rarely have background images that are exactly the size of your HTML element. The way that glue generates sprites makes them only useful for when you're replacing img tags.

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