Problem with files size in /var/lib/postgres/data/global on Debian Woody

Hi,

I am having a problem now with postgres version 7.2.1-2woody2.
The size mentionned for /var/lib/postgres/data/global is different when
trying a "du" and when summing a listing of all files; which gives me a
difference of about 300 MB.

I tried to stop and restart postgres and vacuuming it just in case it
was some strange behavior when not vacuuming, but it's not.

This db is not important in terms of size (tuples) so why is this
happening and how can I fix it?

Here is a listing of my /var/lib/postgres/data/global directory:

total 465076
drwx------    2 postgres postgres     4096 fév  3 15:43 .
drwx------    6 postgres postgres     4096 fév  3 15:43 ..
-rw-------    1 postgres postgres     8192 jan 29 15:41 1260
-rw-------    1 postgres postgres     8192 jan 29 15:41 1261
-rw-------    1 postgres postgres     8192 fév  3 04:02 1262
-rw-------    1 postgres postgres    16384 oct 28 11:05 16430
-rw-------    1 postgres postgres    16384 oct 28 11:05 16431
-rw-------    1 postgres postgres    16384 oct 29 04:00 16433
-rw-------    1 postgres postgres    16384 oct 29 04:00 16434
-rw-------    1 postgres postgres    16384 oct 29 04:00 16450
-rw-------    1 postgres postgres    16384 oct 29 04:00 16451
-rw-------    1 postgres postgres     8192 fév  3 15:43 pg_control
-rw-------    1 postgres postgres       35 oct 28 11:18 pg_pwd
-rw-------    1 postgres postgres        6 fév  3 15:43 pgstat.stat
-rw-------    1 postgres postgres        0 déc 17 14:41 pgstat.tmp.32209


Thanks for helping,

--
Picrate <picrate@ibelgique.com>