[Mono-dev] Casting error loading viewstate

[APS]

Hi,

yesterday I moved my web application from Opensuse Mono 2.0.1 to 
CentOS Mono 2.4.
Now in some page, during postback I obtain the following error. I 
will check what there is in viewstate but I can't understand why it 
works on 2.0.1 and not on 2.4
Some change in Mono can cause this problem? Thanks in advance.

System.Web.HttpUnhandledException: Exception of type 
'System.Web.HttpUnhandledException' was thrown. ---> 
System.InvalidCastException: Cannot cast from source type to destination type.
   at System.Web.UI.StateBag.LoadViewState (System.Object savedState) 
[0x00000]
   at System.Web.UI.Control.LoadViewState (System.Object savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Control.LoadViewStateRecursive (System.Object 
savedState) [0x00000]
   at System.Web.UI.Page.LoadPageViewState () [0x00000]
   at System.Web.UI.Page.RestorePageState () [0x00000]
   at System.Web.UI.Page.InternalProcessRequest () [0x00000]
   at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext 
context) [0x00000]
   --- End of inner exception stack trace ---
   at System.Web.UI.Page.ProcessException (System.Exception e) [0x00000]
   at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext 
context) [0x00000]
   at System.Web.HttpApplication+<Pipeline>c__Iterator2.MoveNext () [0x00000]
   at System.Web.HttpApplication.Tick () [0x00000]


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