Hi,

On a custom-compiled Python 2.5 on Ubuntu Dapper, I get:
yello@outback:~/code/python $ python bug_1666807.py
Version info: (2, 5, 0, 'final', 0)

File for `inspect` : /usr/local/lib/python2.5/inspect.py
File for `inspect.iscode`: /usr/local/lib/python2.5/inspect.py
Do these match? True
OK


On a system python 2.4.3 on another Ubuntu Dapper system, I get:
yello@adelaide:~/code/python $ python bug_1666807.py
Version info: (2, 4, 3, 'final', 0)

File for `inspect` : /usr/lib/python2.4/inspect.py
File for `inspect.iscode`: /usr/lib/python2.4/inspect.py
Do these match? True
OK

However, I can recreate this issue on another system (CentOS4) with a custom install where a symlink is involved.  I get: 
[prompt goes here python]$ python bug_1666807.py
Version info: (2, 2, 3, 'final', 0)

File for `inspect` : /xxx/yyyy/PythonHome/lib/python2.2/inspect.py
File for `inspect.iscode`: /xxx/yyyy/Python-2.2/lib/python2.2/inspect.py
Do these match? 0
BUG - this is a bug in this version of Python

Is a symlink involved on the system where you saw this behaviour?