Invalid postback or callback argument of ASP.NET

Today I found this error when I start debug my code. I have never seen it before. Therefore I suspected that the problem is that I removed the Google Adsense block programatically in my debug environment.

The problem is, the error only happens in IE 7. In Firefox 3.0 it works fine.

I then suspect the error comes from the debug environment. I turned off the Debug="true" in my web.config. The same error happens.

The real bad thing is, I opened the hosted website using IE 7 and the same error appears. This means all my visitors will got this error if they browse my web pages using IE7 and click certain radio buttons. This is pretty serious now.

After more investigation, I found a few good posts.

nvalid Postback or Callback Argument Error in ASP.NET 2.0

And this post leads to really good analysis.

ASP.NET Event Validation and “Invalid Callback Or Postback Argument” : Part I

ASP.NET Event Validation and “Invalid Callback Or Postback Argument” : Part II


Event Validation Errors and Network Congestion in ASP.NET

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