Some older versions of these browsers don't have the more recent canvas pixel manipulation APIs (or worse, they are there and broken in the case of Arora 0.5).
一些老版本的浏览器也没有提供canvas像素操纵API（更糟的是，有的浏览器虽然提供了支持，但一使用Arora 0.5就崩溃了）。
RV40 had a hilarious example of this, where a typo of "22" instead of "33" resulted in quarter-pixel motion compensation being broken.
RV40证明了这一点，一个滑稽的例子就是一个本应该输入33的地方被错误输入成22，导致四分之一像素运动补偿功能错误。
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