Missing files in locatedb

[Victor Munoz <vmunoz@macul.ciencias.uchile.cl>]

Hello. Today I found a very strange problem. Some files seem to be
missing from locatedb database. 

It all started with one particular file I wanted to find. But 'locate
<word>' didn't find the file I was looking for. I went to the
directory it was supposed to be, and there it was!

I have a cron job to updatedb every night. In fact:

$ ls -l /var/cache/locate/
total 7020
-rw-r--r-- 1 root root 7173582 2007-09-27 06:26 locatedb

So it seems to be in order. The file I wanted was created in August. So?

In fact, none the files in this directory is in the database!

In case you're curious, the directory is named

~/textos/fisica/departamento_fisica/departamento

In /etc/updatedb.conf, there is the following line:

PRUNEPATHS="/tmp /usr/tmp /var/tmp /afs /amd /alex /var/spool /sfs /media"

So I don't think updatedb should omit this directory. In fact, none of
the files in any subdirectory of ~/textos/fisica/departamento_fisica/
is indexed!

I've made some random search of files in other directories, and they
seem indexed. In fact files in ~/textos itself are indexed. 

Some files in the original problematic directory have permissions
-rw------- (does updatedb respect this), but the file I was looking
for in the first place has read permissions for all.

I don't understand. Does any?

Regards,

Victor