pool_get(buf32k): free list modified

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
on a netbsd-5/i386 NFS server I got:
panic: pool_get(buf32k): free list modified: magic=2010306; page 0xcf7a0000; 
item addr 0xcf7a0000

I also see occasional on-disk data corruption (shown as "unknown file type"
by fsck, or file, type, owner, or size change) looking like corruption of
a inode block.
Does it ring a bell to someone ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--