Samba shows each file several times in the same folder

[Torok Peter]

Hi!

I have a Samba 3.5.11 on Debian/kFreeBSD (sid) with ZFS filesystem.
The error come up yesterday, I opened of the dirs and the same file camed
up several times.

Picasa.ini
IMG_1377.JPG
IMG_1378.JPG
IMG_13*80*.JPG
IMG_13*80*.JPG
IMG_1384.JPG
IMG_1385.JPG
IMG_13*86*.JPG
IMG_13*86*.JPG
IMG_13*87*.JPG
IMG_13*87*.JPG
IMG_13*88*.JPG
IMG_13*88*.JPG

With the same name, they are the same files (same size, same content, etc.)
If I open on the linuxbox with Midnight Commander, everything is ok, no
doubleing the files.

In some cases no doubling, but in some dirs each files showed up more than
10 times, which froozed Total Commander, by then.

On Windows If I open Total Commander, of Windows Explorer, the same effect.

I also tested samba 3.6.1 from Debian experimental repo, same effect.

I don't know where to start debugging, or what can be the problem.

Thanks for your help!
Peter Torok