http://www.uploadify.com/forum/#/discussion/7329/uploadify-v3-bug-unecessary-request-when-there-is-no-button_image_url-set-/p1

原来问题的症结在于SWFUpload，这个是Uploadify调用供支持Flash上传用的，但是其没有对button_image_url进行判断，导致如果button_image_url为空的话就默认请求了当前根路径，修改的方法也比较简单，加个判断即可：

将jquery.uploadify.js中下面代码：

this.settings.button_image_url = SWFUpload.completeURL(this.settings.button_image_url);
修改成如下：

if (this.settings.button_image_url != "") {
this.settings.button_image_url = SWFUpload.completeURL(this.settings.button_image_url);
}