I've had a look on Safari 1.3.2 which has never visited arduino.cc before, and it looks the same as the FF pic.
As of about an hour ago, it looks fine in Safari 1.3.2, but the buttons look very different, so I'm guessing this has been fixed.
As at a minute ago it still looked the same as the pic, in FF & Safari.
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If it looks good there, then there must be something weird with our cache(s).