ACL mapping problem

[Andreas Moroder]

Hello,

on a directory when I make getfacl then I get

user:testuser:rwx
user:40848:rwx
user:41048:rwx
group::rwx
group:bx_tech_abt-arzt_san_leit:rwx
group:bx_tech_abt-andere_san:rwx
group:bx_tech_abt-hilfskraft:rwx


The problem is that 40848 and 41048 are groups !!
This happen when I open the windows security properties and try to 
change the rights of testuser.
On windows it looks like testuser has no rights, while from getfacl it 
has rwx.

We use samba Version 3.5.3 ( according to smbstatus -V )

Is this a know problem and is there a solution ?

Thanks
Andreas