[SLUG] ls lists numbers, not owner names

["Voytek Eymont" <lists@xxxxxxxxxx>]

I'm trying to fix my failed clam install, and, just noticed, when I list
certain files, I get owner/group not as names, but, as numbers;

what is that trying to tell me ?

 # ls -al /var/log/clamav
total 188
drwxr-xr-x   2  104  105  4096 Sep  3 02:31 .
drwxr-xr-x  16 root root  4096 Oct 19 04:12 ..
-rw-r-----   1  104  105  3774 Jul 20 04:12 clamd.log.1
-rw-r--r--   1  104  105     0 Jul 27 04:12 freshclam.log



-- 
Voytek