title: ASP.NET Viewstate with Safari 5.x
body: <p>I have an ASP.net 3.5 sp1 web application that is running on IIS6 and has the machine and validation keys set in the web config.  The application functions correctly on all browsers except safari.</p>
  
  <p>The page loads correctly but when a postback is performed I receive a "Validation of Viewstate MAC failed" error.  (Also, the app pool only recycles once a day during the night but this shouldn't make a difference as the keys are fixed.)</p>
  
  <p>I have found several suggestions on the internet including limiting the size of the viewstate fields via the web config and also disabling Prefetch within safari - non of which have worked.</p>
  
  <p>I have found other posts on Stackoverflow but non of them helped in resolving the issue.</p>
  
  <p>Is this a known issue with safari or has anyone else encountered this problem ?</p>