--- email-2.5.6/email/Header.py.	2005-06-07 17:47:35 +0400

+++ email-2.5.6/email/Header.py	2005-06-07 17:47:37 +0400

@@ -260,6 +260,9 @@

             charset = self._charset

         elif not isinstance(charset, Charset):

             charset = Charset(charset)

+        # if charset is fail

+        if charset == 'us-ascii' and email.Generator._is8bitstring(s):

+            s = email.quopriMIME.header_encode(s)

         # If the charset is our faux 8bit charset, leave the string unchanged

         if charset <> '8bit':

             # We need to test that the string can be converted to unicode and

--- email-2.5.6/email/base64MIME.py.	2005-06-07 17:47:44 +0400

+++ email-2.5.6/email/base64MIME.py	2005-06-07 17:48:12 +0400

@@ -173,7 +173,7 @@

     if not s:

         return s

-    dec = a2b_base64(s)

+    dec = a2b_base64(s + "==")

     if convert_eols:

         return dec.replace(CRLF, convert_eols)

     return dec