Getting error: "Validation of viewState MAC failed."
<p>I get the error:
"Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster ensure that <code>&lt;machineKey&gt;</code> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster."</p>

<p>I don't use this error if I do not go through Load Balancer. If I go through Load Balancer, I get this error about 50% of the time. Load Balancer has sticky sessions.</p>

<p>My config file is like this:
    validationKey='2EEA416CEFC6D6BE856ED57B97FB9CA7DFACE17C073125949A1D682C80A44BB2AD887DDDC13DBFB0954F1000FEE5757E99693F222F8E28CAA2E6DAB8C4F99E0C'
    decryptionKey='877478B2F33A74226ABEF55FDCC1A76E43F1BBEA6241A592'
    validation='SHA1' /></p>

<pre><code>&lt;pages enableViewStateMac="false"&gt;
</code></pre>

<p>so, I already have enableViewStateMac="false". How can I make the sporadic errors to go away?</p>
