samba - May 2009 - Issue creating read-only files and not being able to change back to read/write

SAMBA v3.0.0 on Solaris 10

I have a SAMBA share that I am accessing on Windows.  When a Windows
user creates a read-only file, they are unable to change the
persmissions back to read/write.  When I login in to the UNIX side,
there user/group permissions look correct.  Any ideas?  Here is the
smb.conf

[global]
        workgroup = XXXXXXXXXXX
        security = DOMAIN
        password server = XXX.XXX.XXX.XXX
        restrict anonymous = 2
        max open files = 20000
        preferred master = No
        local master = No
        domain master = No
        kernel oplocks = No
        ldap ssl = No
        oplocks = No
        level2 oplocks = No
        winbind separator = +
        create mask = 0774
        directory mask = 0775
        force directory mode = 0775

[data1]
        path = /data1
        read only = No