How to solve FTP problem following last security update

Several users can not connect via FTP anymore after installing the last security update. While waiting for a fix, there is a mean to recover its FTP connection capabilities thanks to Apple Discussion NewsGroups (thanks Philippe):
- download from one of the following mirror site the file : ftpd.sit.
Pour Mac OS X 10.2.8 : http://macadam.dyndns.org/downloadable/1028
Pour Mac OS X 10.3.5 : http://macadam.dyndns.org/downloadable/1035
- Uncompress it.
- Once login as root, look for the invisible element ftpd which is located into the invisible folder usr/libexec.
- rename it and place the new downloaded one in this folder.

If the FTP does not work, via the Terminal execute the following commands:
sudo chown root /usr/libexec/ftpd
sudo chmod 555 /usr/libexec/ftpd
That's it.