无法在 Xcode 管理器中恢复到 3.1.3
我使用的是 Xcode 3.2.1，并且不小心在 iTunes 中将我的 iPod 更新到了 4.2.1。
当我打开 Xcode > 时Organizer 并尝试将我的 iPod 恢复到 3.1.3。
http://img195.imageshack.us/i/screenshot20110318at630.png/
失败出现错误消息：无法预检个性化安装
http://img402 .imageshack.us/i/screenshot20110318at633.png/
我正在使用这个软件图像：
iPod2,1_3.1.3_7E18_Restore.ipsw
我很确定这个图像没有损坏，因为它来自 pfd.apple.com 和我已经重新下载了好几次了。
我的 iPod 是在配置门户中注册的设备，我以前从未越狱过它。
您认为问题出在哪里？
提前致谢。
I am using Xcode 3.2.1 and I accidentally updated my iPod to 4.2.1 in iTunes.
When I open Xcode > Organizer and try to restore my iPod to 3.1.3.
http://img195.imageshack.us/i/screenshot20110318at630.png/
It fails with an error message: Unable to preflight personalized install
http://img402.imageshack.us/i/screenshot20110318at633.png/
I am using this software image:
iPod2,1_3.1.3_7E18_Restore.ipsw
And I am quite sure this image is not corrupted since it comes from pfd.apple.com and I have re-downloaded it for several times.
My iPod is a registered device in the Provisioning Portal and I have never jailbroken it before.
What do you think the problem is?
Thanks in advance.
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我在苹果会员中心开发者论坛上搜索过，读了一些帖子后，我可以得出的结论是，除非你之前保存过SHSH，否则你不可能将其从4.x降级到3.1.3。
忽略购买另一台仍安装 3.1.3 iOS 的 iPod 的选择，您剩下的唯一选择就是说服自己大多数人已经在使用 4.x iOS，支持 3.1.3 并不那么重要。
I have searched in the apple member center developer forum, after reading some posts, what I can conclude is, unless you have previously saved you SHSH, you cannot possibly downgrade it from 4.x to 3.1.3.
Ignoring the option of buying another iPod which still has the 3.1.3 iOS installed, the only option you are left with, is to persuade yourself that most people are already using 4.x iOS and supporting 3.1.3 is not that important.