这个是 4 月的一个官方声明。贴下，做个记录
* Support the alpha channel in PNG images. We’ve actually had this on our radar for a long time, and have had it supported in the code for a while now. We have certainly heard the clear feedback from the web design community that per-pixel alpha is a really important feature.
好了，终于支持 Aplha 通道的 PNG 文件，也就是透明的 PNG 了。
* Address CSS consistency problems. Our first and most 阅读全文