wu-ftpd (wu-ftpd-2.6.0-14.6x) seems to have been compiled with --enable-numericuid no user/group names appears ... According to documentation this configure option : "Makes the internal ls display UID and GID instead of user/group names. This is faster especially on systems with many users, but the ls output looks worse." That's is differnet from the last version of wu-ftpd in 6.2 release. How to do to have same previous behaviour ? Thank
We are not using the internal ls because it has not had enough testing. The external ls command is run chrooted, so it can't resolve user/group names if you don't have a /home/ftp/etc/passwd and /home/ftp/etc/group file.
The internal ls feature was enabled in the wu-ftpd update packages, as I mentioned in my additional comments to bug # 13492.