slocate automatically prunes dirs such as /dev, /proc and /tmp from the db file per default. However, with Linux 2.6, there's a new directory that I mostly think belongs to the above list, /sys. I don't think that the info in sysfs is doing any good when it shows up in locate's results. Reproducible: Always Steps to Reproduce: 1. 2. 3.
from /etc/updatedb.conf PRUNEFS="NFS nfs afs proc smbfs autofs auto iso9660 devfs tmpfs ncpfs sysfs" so, it seems somebody beat you to it ;)