unable to validate data.

[tascienu]

This problem is happening sporadically. I have a reason then to believe
it's not a problem with my server. Anyone knows the reason why?

Some users are submitting successfully others are not.. it's just like
1% of posts failing...

---------------------------------------------

Error Message: Unable to validate data.
Stack Trace:
at System.Web.Configuration.MachineKey.GetDecodedData(Byte[] buf,
Byte[] modifier, Int32 start, Int32 length, Int32& dataLength)
at System.Web.UI.LosFormatter.Deserialize(String input)
GetDecodedData