EXT3 problem ?

Hi,

I will try to explain my problem but I m very bad in english...

I am running enbd with 4 server builing raid 1 on the client. One of the 
mirrored partition is /var/spool through device /dev/md2.

Some time, I find in /var/log/kernel this kind of error :

Jul 24 05:13:27 cyril kernel: EXT3-fs error (device md(9,2)): ext3_readdir: 
bad entry in directory #26625: rec_len is smaller than minimal - offset=0, 
inode=0, rec_len=0, name_len=0
Jul 24 05:13:27 cyril kernel: EXT3-fs error (device md(9,2)): ext3_add_entry: 
bad entry in directory #26625: rec_len is smaller than minimal - 
offset=10240, inode=0, rec_len=0, name_len=0
Jul 24 05:13:27 cyril last message repeated 4 times
Jul 24 06:13:27 cyril kernel: EXT3-fs error (device md(9,2)): ext3_readdir: 
bad entry in directory #26625: rec_len is smaller than minimal - offset=0, 
inode=0, rec_len=0, name_len=0

Then, if I type the commande :
# du *
on /var/spool I have got some input/output errors
So I resolv problem this fsck

I think that it was due to the journalization, but I work on a 2.4.21-4.ELsmp 
kernel

Do you have you suggestion for the origin of this errors ?

 thanks a lot