title: Microsoft CRM 4.0 form attribute mysteriously read-only
body: <p>I've inherited a customization of Campaign Response in which the Customer attribute is read-only on the form (in both create and update modes), and I can't figure out why. The form has no OnLoad javascript, the attribute "customer" (which is a partylist) is Searchable, and the field-level behavior for the attribute on the form has "Field is read-only" unchecked.  The attribute is read-only even for the System Administrator, so it's not an authorization issue.</p>
  
  <p>What else could be making this field read-only?</p>
  
  <p>Thanks,</p>
  
  <p>Phil</p>