--- versionedFile/extVersionedFile.py	2008/06/27 18:20:40	1.24
+++ versionedFile/extVersionedFile.py	2008/08/08 16:19:26	1.25
@@ -797,6 +797,8 @@ class extVersionedFile(CatalogAware,Fold
         self.id=id
         self.title=title
         self.lockedBy=lockedBy
+        if self.lockedBy is None:
+            self.lockedBy = ''
         self.author=author
         self.lastVersionNumber=0
         self.lastVersionId=None
@@ -896,6 +898,8 @@ class extVersionedFile(CatalogAware,Fold
     
     def getLockedBy(self):
         """get locked by"""
+        if self.lockedBy is None:
+            self.lockedBy = ''
         return str(self.lockedBy)
     
     def getLastVersionNumber(self):