Only in src5.1.3/KERNEL_SRC_5.1.3/src/KERNEL_PY: .import_hook.py.swp
diff -ur src5.1.3.orig/KERNEL_SRC_5.1.3/src/KERNEL_PY/import_hook.py src5.1.3/KERNEL_SRC_5.1.3/src/KERNEL_PY/import_hook.py
--- src5.1.3.orig/KERNEL_SRC_5.1.3/src/KERNEL_PY/import_hook.py	2010-03-07 17:35:38.450323100 +0100
+++ src5.1.3/KERNEL_SRC_5.1.3/src/KERNEL_PY/import_hook.py	2010-03-07 17:37:18.940255407 +0100
@@ -150,7 +150,7 @@
             l.append((subname,submod))
     return l
 
-def import_hook(name, globals=None, locals=None, fromlist=None, *args):
+def import_hook(name, globals=None, locals=None, fromlist=None, level=-1, *args):
     """ Import replacement for sharing modules among multiple interpreters
         Mostly update sys.modules before doing real import
     """