=== modified file 'hr/hr.py'
--- hr/hr.py	2010-09-11 13:29:00 +0000
+++ hr/hr.py	2010-10-02 17:33:47 +0000
@@ -132,18 +132,26 @@
     }
 
     def onchange_company(self, cr, uid, ids, company, context=None):
-        company_id = self.pool.get('res.company').browse(cr,uid,company)
-        for address in company_id.partner_id.address:
-            return {'value': {'address_id': address.id}}
-        return {'value':{}}
+        if company:
+            company_id = self.pool.get('res.company').browse(cr,uid,company)
+            for address in company_id.partner_id.address:
+                return {'value': {'address_id': address.id}}
+        else:
+            return {'value':{}}
 
     def onchange_department(self, cr, uid, ids, department_id, context=None):
-        manager = self.pool.get('hr.department').browse(cr, uid, department_id).manager_id.id
-        return {'value': {'parent_id':manager or False}}
+        if department_id:
+            manager = self.pool.get('hr.department').browse(cr, uid, department_id).manager_id.id
+            return {'value': {'parent_id':manager or False}}
+        else:
+            return {'value': {'parent_id':False}}
 
     def onchange_user(self, cr, uid, ids, user_id, context=None):
-        mail = self.pool.get('res.users').browse(cr,uid,user_id)
-        return {'value': {'work_email':mail.user_email}}          
+        if user_id:
+            mail = self.pool.get('res.users').browse(cr,uid,user_id)
+            return {'value': {'work_email':mail.user_email}}
+        else:
+            return {'value': {'work_email':False}}
         
     def _get_photo(self, cr, uid, context=None):
         return open(os.path.join(