.NET 2.0 – Event validation fails when postback occurs before a page is rendered completely

http://support.microsoft.com/kb/969548

Solution: Upgrade the system to the .NET Framework 2.0 SP2 or the .NET Framework 3.5 SP1.

Other information related to this issue.

Related posts:

  1. “HTTP Error 404 – File or Directory not found” error message when you request dynamic content with IIS 6.0 I ran across this problem with an ASP page and...
  2. How to take ownership of a file or folder in Windows XP I keep getting the error message below, so I did...