--- versionedFile/extVersionedFile.py	2010/05/11 09:03:08	1.36
+++ versionedFile/extVersionedFile.py	2010/05/12 10:58:21	1.37
@@ -756,7 +756,7 @@ class extVersionedFileObject(ExtFile):
         """download and lock"""
         if repr(self.REQUEST['AUTHENTICATED_USER'])=='Anonymous User':
             return "please login first"
-        if not self.aq_parent.lockedBy=="":
+        if (not ((self.aq_parent.lockedBy=="") or (self.aq_parent.lockedBy==None))):
             return "cannot be locked because is already locked by %s"%self.lockedBy
         self.aq_parent.lockedBy=self.REQUEST['AUTHENTICATED_USER']
 
@@ -769,9 +769,7 @@ class extVersionedFileObject(ExtFile):
         return self.versionNumber
 
     security.declarePublic('getVersionComment')                                              
-    def getVersionComment(self):
-        """get version"""
-        return self.versionComment
+  
 
     security.declarePublic('lastEditor')                                              	
     def lastEditor(self):
@@ -1208,7 +1206,7 @@ class extVersionedFile(CatalogAware,Fold
         
         if str(self.REQUEST['AUTHENTICATED_USER']) in ["Anonymous User"]:
             return "please login first"
-        if (self.lockedBy==self.REQUEST['AUTHENTICATED_USER']) or (self.lockedBy==''):
+        if (self.lockedBy==self.REQUEST['AUTHENTICATED_USER']) or (self.lockedBy=='') or (self.lockedBy==None):
             ext=self.ZopeFind(self.aq_parent,obj_ids=["addNewVersion.dtml"])
             if ext:
                 return ext[0][1]('',globals(),version=self.getVersion(),lastComment=self.getContentObject().getVersionComment(),AUTHENTICATED_USER=self.REQUEST.AUTHENTICATED_USER)
@@ -1280,7 +1278,7 @@ class extVersionedFile(CatalogAware,Fold
 
         if repr(self.REQUEST['AUTHENTICATED_USER'])=='Anonymous User':
             return "please login first"
-        if not self.lockedBy=="":
+        if not ((self.lockedBy=="") or (self.lockedBy==None)):
             return "cannot be locked because is already locked by %s"%self.lockedBy
         self.lockedBy=self.REQUEST['AUTHENTICATED_USER']
         self.getContentObject().content_type="application/octet-stream"