title: Symfony 1.4: Custom error message for CSRF in forms
body: <p>Can anyone tell me where/how to customise the CSRF token error message for forms in Symfony 1.4. I'm using sfDoctrineGuard for logins and in this form particularly, whenever a session runs out and you still have the page open, it throws a very user-unfriendly error: "CSRF attack detected". Something like "This session has expired. Please return to the home page and try again" sounds better.</p>
  
  <p>What's the right way to do this in the form class?</p>
  
  <p>Thanks.</p>