rem:  document.getElementById("imap.overrideNamespaces").value = imapServer.overrideNamespaces.toString(); 
add: document.getElementById("imap.overrideNamespaces").checked = imapServer.overrideNamespaces; 
context: function saveServerLocally(imapServer){    // boolean prefs, JS does the conversion for us    document.getElementById("imap.dualUseFolders").value = imapServer.dualUseFolders.toString();    document.getElementById("imap.usingSubscription").value = imapServer.usingSubscription.toString();    // string prefs    document.getElementById("imap.personalNamespace").value = imapServer.personalNamespace;    document.getElementById("imap.publicNamespace").value = imapServer.publicNamespace;    document.getElementById("imap.serverDirectory").value = imapServer.serverDirectory;    document.getElementById("imap.otherUsersNamespace").value = imapServer.otherUsersNamespace;    // boolean prefs, JS does the conversion for us    document.getElementById("imap.overrideNamespaces").value = imapServer.overrideNamespaces.toString();}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/49cb68986d41d169b640ed73301f70112b205e74/am-server.js/clean/mailnews/base/prefs/resources/content/am-server.js