Finally! I can edit PythonScripts via FTP and WebDAV with impunity :-)

doc/CHANGES.txt

@@ -4,6 +4,13 @@ Zope Changes
   Change information for previous versions of Zope can be found in the
   file HISTORY.txt.
 
+  after Zope 2.5.1
+
+      - Fixed long standing bug in PythonScript where get_size returned
+        the incorrect length. This broke editing using EMACS via FTP or
+        WebDAV. Thanks to John Glavin at South River Technologies for
+        help finding the bug.
+
   Zope 2.5.1 beta 1
     
     Bugs Fixed

lib/python/Products/PythonScripts/PythonScript.py

@@ -17,7 +17,7 @@ This product provides support for Script objects containing restricted
 Python code.
 """
 
-__version__='$Revision: 1.39 $'[11:-2]
+__version__='$Revision: 1.40 $'[11:-2]
 
 import sys, os, traceback, re, marshal
 from Globals import DTMLFile, MessageDialog, package_home
@@ -453,7 +453,7 @@ class PythonScript(Script, Historical, Cacheable):
 
     def params(self): return self._params
     def body(self): return self._body
-    def get_size(self): return len(self._body)
+    def get_size(self): return len(self.read())
     getSize = get_size
 
     def PrincipiaSearchSource(self):

lib/python/Products/PythonScripts/tests/testPythonScript.py

@@ -153,6 +153,10 @@ class TestPythonScriptNoAq(unittest.TestCase):
         true = self._newPS(readf('boolean_map'))()
         assert true
 
+    def testGetSize(self):
+        f = self._newPS(readf('complex_print'))
+        self.assertEqual(f.get_size(),len(f.read()))
+
 def test_suite():
     suite = unittest.TestSuite()
     suite.addTest( unittest.makeSuite( TestPythonScriptNoAq ) )