This fails with NPE on line 1...

NPE_on_line_1.clj

(ns myapp.domain.user
  (:require clj-record.boot)
  (:require
    [myapp.util.date                 :as date-util]
    [clj-time.core                   :as clj-time]
    [clojure.contrib.sql             :as sql]
    [clj-record.validation.built-ins :as valid]
    [clj-record.callbacks.built-ins  :as cb]
    [clj-time.core                   :as clj-time]
    [myapp.config                    :as config]
    [myapp.util.encrypt              :as encrypt]
    [myapp.util.date                 :as date-util]
    [myapp.domain.email-status       :as email-status])
  (:use clojure.contrib.condition))

; Function definitions etc. follow...

When I run my app (from CounterClockwise), I get this:
Clojure 1.2.0
java.lang.RuntimeException: java.lang.NullPointerException (user.clj:1)
1:1 user=>

My line 1 is just the namespace declaration and a bunch of imports (see above). I tried reverting line 1 to my last successful checkin, but the problem remains. It's obviously caused elsewhere in my app. How to I go about diagnosing this?