wu-ftpd-2.6.0-0.5.x does not recognize the -I0 switch (no ident calls). This will make the ftp server unaccessable if the switch is used in inetd.conf with the original version.
Unable to duplicate error in wu-ftpd-2.6.1.1 Please upgrade to the current release and re-open this ticket if the problem still persists. Henri J. Schlereth RedHat Beta Team