User blog comment:BertH/Technical Update: October 9, 2012/@comment-1142365-20121009203616/@comment-4674838-20121013040903

Starfleet Academy: It's not just gradients, box-shadow only works in IE9+, transitions aren't supported, border-radius is IE9+ only, rgba colors (very handy for setting color + transparency together) and opacity are IE9+ only, just to name a few :(