Steps to reproduce on Debian Sarge:
1. ls -l /dev/null
2. wget
http://www.python.org/ftp/python/2.5/Python-2.5b2.tgz
3. tar xvzf Pyth*
4. cd Pyth*
5. ./configure
6. make
7. su
8. make test
9. ls -l /dev/null

/dev/null goes from being a special character device to
a normal file of length zero.

The following command can be used instead of step 8
above to delete /dev/null
./python -c 'import ctypes.test.test_find'


To recreate /dev/null:
1. su
2. rm /dev/null
3. mknod -m 666 /dev/null c 1 3
4. chown root:root /dev/null