Strange problems with permissions on fat32 partitions

[Michelasso <qzerty@gmail.com>]

I have added this line to /etc/fstab in order to mount at boot the windows
partition of my hd and to give every user permission to write on it:

/dev/hda1       /mnt/win        vfat
rw,users,umask=000,uid=1000,gid=100     0       0

But I have this problem: I don't have write access to some
directories,  as for example:

dr-xr-xr-x  44 user users  32768 2005-07-28 14:39 Pictures

and I *have* write access to all directories inside it, as for example:

drwxrwxrwx   2 user users 32768 2005-08-12 12:29 2005_05_04

Where am I wrong (If I am wrong)?