The new 'standards' mode of IE8 turns off some nonstandard features. Among them VML, which is used by excanvas. I just set for IE7 'standards' mode, so it still works.
<meta http-equiv="X-UA-Compatible" content="IE=7" />
Frustrating, but i don't know of any advantage brought up by IE8.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…