IE 7 已经修复的问题如下：

1. IE 6 suffered from memory leaks when a circular reference between several objects, among which at least one DOM node, was created. This problem has been solved in IE 7.

DOM循环调用，导致内存泄漏。

2. IE 6 crashed on the normalize() method (test page). This crash, too, has been solved.

normalize() 方法导致浏览器崩溃。

3. IE 7 now supports XMLHttpRequest “natively” instead of through an ActiveX object.

IE 7 支持 XMLHttpRequest 而不再需要 activex 控件

quirksmode.org 认为需要修正的 bug 如下：

* getElementById should ignore the name attribute.

getElementById 应该忽略掉 name 属性。在IE中