Please describe the problem:
Depending on the way to create files (through Nautilus, creating a blank file in
a folder) or through an Xterm (touch file, in the same place, with the same
user), the permissions on both files differ.

This is very disturbing, anoying, weird and practically, what should I do to
obtain a proper functionning?

Steps to reproduce:
1. create a group (through the "users and groups" tool)

2. include your user in this group (my user is "moi", my group is called
"famille" ; "famille" is not my primary group)
I included the line "umask 002" in moi's .bash_profile 

3. created a folder named "famille" in the /home directoy. Set up its
owner:group as moi:famille. Set up its permissions as drwxrws---

4. create a symbolic link from /home/moi to /home/famille/

5. open an xterm (Terminal GNOME 2.8.2) under moi's out-of-the-box Debian
testing Gnome session, then:
cd famille
touch toto1

6. open Nautilus in the same session, then:
- double click on the "famille" symbolic link => I reach /home/famille/
- right-clic in this folder, then "create a document / empty document" and
rename it "toto2"


Actual results:
The permissions and groups of both files are not identical! I display them in
the terminal, as follows:
~/famille$ ls -al toto*
-rw-r--r--  1 moi famille    0 2005-02-10 23:48 toto1
-rw-------  1 moi moi        0 2005-02-10 23:48 toto2

Expected results:
~/famille$ ls -al toto*
-rw-r--r--  1 moi famille    0 2005-02-10 23:48 toto1
-rw-r--r--  1 moi famille    0 2005-02-10 23:48 toto2

Does this happen every time?
Yes, not only on my machine but on another one too.
Mine is a pure up-to-date Debian testing machine, the other one does not belong
to me and is a Debian with a testing / unstable mix, I am not its administrator.

Other information:
Folder creation works ok: same result with both Nautilus and shell creation methods:
drwxr-sr-x   2 jbb  famille 4096 2005-02-11 00:21 dir1
drwxr-sr-x   2 jbb  famille 4096 2005-02-11 00:24 dir2

Where does this behaviour while creating file come from? How do I do to get rid
dof it ?
Pratically, this is a pain. Furthermore, it deeply disturbs me.