With a cvs update, test_email.py fails because the behavior of re.split() has changed, presumably due to /F's latest sre checkins. Here's a boiled down example: -------------------- snip snip -------------------- import re ecre = re.compile(r''' =\? # literal =? (?P<charset>[^?]*?) # non-greedy up to the next ? is the charset \? # literal ? (?P<encoding>[qb]) # either a "q" or a "b", case insensitive \? # literal ? (?P<atom>.*?) # non-greedy up to the next ?= is the atom \?= # literal ?= ''', re.VERBOSE | re.IGNORECASE) print ecre.split('=?iso-8859-1?q?this=20is=20some=20text?=', 1) -------------------- snip snip -------------------- In Python 2.2b1 this prints ['', 'iso-8859-1', 'q', 'this=20is=20some=20text', ''] but in today's cvs this prints ['', 'iso-8859-1', 'q', 'this=20is=20some=20text'] Notice the missing trailing empty string. :( -Barry