Html.AntiForgeryToken()在升级到.NET 3.5 SP1后导致错误

我刚刚更新到.NET 3.5 SP1,我曾经工作过的ASP.NET MVC页面现在已经停止工作了.

在尝试加载页面时,我得到以下YSOD

[CryptographicException: Padding is invalid and cannot be removed.]
   System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast) +7596702
   System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +208
   System.Security.Cryptography.CryptoStream.FlushFinalBlock() +33
   System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, IVType ivType, Boolean useValidationSymAlgo) +225
   System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +195

[ViewStateException: Invalid viewstate. 
    Client IP: 127.0.0.1
    Port: 
    User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6 (.NET CLR 3.5.30729)
    ViewState: hC6BC8KsuD/yoy2iG74bUZ8TYhGfuDDeIjh9fg/L18yr/E+1Nk/pjS5gyn9O+2jY
    Referer: http://localhost:1092/admin/product
    Path: /admin.aspx/product/edit/4193]

[HttpException (0x80004005): Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that  configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.]
   System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +106
   System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState) +14
   System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +242
   System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) +4
   System.Web.Mvc.AntiForgeryTokenSerializer.Deserialize(String serializedToken) +73

如果我删除该行

<%= Html.AntiForgeryToken() %>

一切都有效,任何想法可能导致这个？如果这是一个MVC或.NET问题,我希望找到一个解决方案更幸运,所以我猜这与我的配置有关.

我已经尝试重新安装MVC框架,看看是不是因为我在SP1之前安装但我仍然遇到同样的问题.Google和SO搜索没有得出任何确切的结论.

Doh,刚解决了.

清除了我的浏览器缓存和cookie,一切正常.