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haml (easily transformed to css) snippet to format abbrs in a proper manner - you can still type them in ALL CAPS, but they will be displayed in Titlecase and small-caps. If you're using this, you're probably also using a custom face via @font-face, so you might want to explicitly declare the small-caps and lowercase variants of the typeface - the browser often fucks up auto-small-caps. also, not tested in internet explorer. nothing I write is.
abbr :display inline-block :text-transform lowercase :font-variant small-caps &:first-letter :text-transform uppercase