DWR 3.0 RC1 and IE8 not working when using Reverse Ajax

我遇到与
http://old.nabble.com/DWR-3.0-RC1-and-IE8-not-working-when-using-Reverse-Ajax-td23923771.html
一样的问题

engine.js
// Do proxies or IE force us to use early closing mode?
if (batch.isPoll && dwr.engine._pollWithXhr == "true") {
batch.map.partialResponse = dwr.engine._partialResponseNo;
}
if (batch.isPoll && dwr.engine.isIE < 8) {
batch.map.partialResponse = dwr.engine._partialResponseNo;
} else if (batch.isPoll && dwr.engine.isIE >= 8) {
batch.map.partialResponse = dwr.engine._partialResponseFlush;
}

也改还和上面一样了
还是不正常在IE8里。
找不到原因，有知道说一下！