Bazaar project shared on Windows and Linux

[guerinp at magic.fr]

Hello,

I'm a C++ developer (alone) and need to use a tool such as Bazaar for a 
project which runs on Windows and GNU/Linux (Ubuntu Hardy).
These two computer are in the same LAN.
The project is mainly developed on a Windows computer (Windows 2000 SP4)
 From Ubuntu, I mount the drive shares with samba.

I have some questions :
- The Bazaar files seem to be compatible regardless of the OSes. Are 
they really ?
- If they are, I experience the following:

    I create two test directories with the same source files, one on a 
Fat32 filesystem and one on NTFS.
    On Windows (Fat32 ou NTFS filesystem)
    bzr init
    bzr add
    bzr commit
    bzr status
        (nothing)

    On Linux (Fat32 filesystem mount)
    bzr status
        /usr/lib/python2.5/site-packages/bzrlib/dirstate.py:237: 
DeprecationWarning: struct integer overflow masking is deprecated
        , st.st_dev, st.st_ino & 0xFFFFFFFF, st.st_mode))[:-1]
        modified:
          ... all my project files

    On Linux (NTFS filesystem mount)
    Bzr status does not give a error message but list all files as modified.

    Why do Bazaar consider files as modified ?
    Do I make a mistake somewhere ?

Thank you for your help.

Kind regards
Patrice.