illumos gate

here is the setup
server:

root@gate:~# uname -a
SunOS gate 5.11 build17.08 i86pc i386 i86pc Solaris
root@gate:~# share
-               /testpool/suid   rw   ""  
root@gate:~# ls -lnad /testpool/suid 
drwxrwxrwx 2 0 0 4 2011-08-24 17:26 /testpool/suid

on the client side i mount this share with default options and copy there the simple suid program (source attached).
When the file is created with "touch" command it gets the owner and group "nobody"
When the file is created with suid program it get the owner "nobody" and group "root"
Here is the log:

root@oi2:/mnt# mount -p | grep /mnt
mnttab - /etc/mnttab mntfs - no 
10.3.52.237:/testpool/suid - /mnt nfs - no rw,xattr
root@oi2:/mnt# pwd
/mnt
root@oi2:/mnt# id
uid=0(root) gid=0(root) groups=0(root),1(other),2(bin),3(sys),4(adm),5(uucp),6(mail),7(tty),8(lp),9(nuucp),12(daemon)
root@oi2:/mnt# 
root@oi2:/mnt# touch test1
root@oi2:/mnt# 
root@oi2:/mnt# ls -lna
total 13
drwxrwxrwx  2     0     0    4 2011-08-24 17:44 .
drwxr-xr-x 25     0     0   26 2011-08-19 12:49 ..
-rwsr-xr-x  1 60001 60001 8660 2011-08-24 17:23 suid
-rw-r--r--  1 60001 60001    0 2011-08-24 17:44 test1
root@oi2:/mnt# 
root@oi2:/mnt# ./suid
String was succesfully writen to rootfile
root@oi2:/mnt# 
root@oi2:/mnt# ls -lna
total 14
drwxrwxrwx  2     0     0    5 2011-08-24 17:44 .
drwxr-xr-x 25     0     0   26 2011-08-19 12:49 ..
-rw-r--r--  1 60001     0   13 2011-08-24 17:44 rootfile
-rwsr-xr-x  1 60001 60001 8660 2011-08-24 17:23 suid
-rw-r--r--  1 60001 60001    0 2011-08-24 17:44 test1
root@oi2:/mnt# 

Isn't it a security issue?