The following module gives different results under 2.4.3 and 2.4.4
(running on Kubuntu, Dapper and Edgy releases, resp.) 

#!/usr/bin/env python
import logging

logger = logging.getLogger("MyLogger")
logger.setLevel(logging.DEBUG)
handler = logging.StreamHandler()
format = "%(levelname)-8s %(module)s %(lineno)d %(message)s"
handler.setFormatter(logging.Formatter(format))
logger.addHandler(handler)

logger.info("Yo")


On 2.4.3 I get
INFO     tmplogger 11 Yo

On 2.4.4 I get
INFO     __init__ 1072 Yo


The versions are 

Python 2.4.3 (#2, Oct  6 2006, 07:52:30)
[GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2

and

Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2