Having some issues with node, express and passport playing nice.

passport-deserialize-failure.js

var express = require('express');
var passport = require('passport');
var bcrypt = require('bcrypt');
var LocalStrategy = require('passport-local').Strategy;
var User = require('./models').User;

var app = module.exports = express.createServer();

// Configuration
app.configure(function(){
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.set('view options', {layout: false});
  app.use(express.bodyParser());
  app.use(express.cookieParser());
  app.use(express.session({secret: "awesome-o"}));
  app.use(express.methodOverride());
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(app.router);
});

// Passport configuration
passport.serializeUser(function(user, cb){ cb(null, user._id) });
passport.deserializeUser(function(uid, cb){
  console.log("Trying to deserialize user: "+uid);
  User.findById(uid, function(err, user){
    cb(err, user);
  });
});

// auth strategy function
passport.use(new LocalStrategy({usernameField: 'email'},
  function(email, pass, done){
    User.findOne({email: email}, function (err, user) {
      // done takes error, user/false, and options hash
      if (err)
        return done(err);
      if (!user)
        return done(null, false, {message: "Couldn't find user"});
      var crypted = bcrypt.hashSync(pass, user.salt);
      if(user.hashpass != crypted)
        return done(null, false, {message: "Bad password"});
      // success!
      return done(null, user);
    });
  }
));

passport.CreateSession =  function (req, res, next) {
  passport.authenticate('local', function(err, user, info){
    if(err || !user)
      return res.json({status: "Failure: "+err});
    req.logIn(user, function (err){
      if(err)
        return res.json({status: "Failure: "+err});
      return res.json({status: "Authenticated"});
    });
  })(req, res, next);
};

passport.DestroySession = function (req, res) {
  req.logout();
  res.json({status: "Logged Out"});
};

passport.CheckSession = function (req, res, next) {
  if(req.isAuthenticated()) { return next(); }
  return res.json({status: "Failure: Authentication"});
};

app.configure('development', function(){
  app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.configure('production', function(){
  app.use(express.errorHandler());
});

// Routes
app.post('/session', passport.CreateSession);
app.del('/session', passport.DestroySession);
app.get('/images', passport.CheckSession, function (req, res) { return {authenticated: "Yep, it's working"}});
//app.resource('images', require('./routes/images'));
//app.post('/user', routes.images);
//app.get('/user/:id/images', routes.images);

app.listen(3000, function(){
  console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);
});