Write permission for an hfs-formatted partition?

[William C Brennan <brennan@netaxs.com>]

Folks,

I have an hfs-formatted partition mounted on my Linux system which I 
use to exchange data with my Mac when its booted with MacOS.  For 
some reason I can not change the permissions, even as superuser.  I 
would like to make the hfs partition writable even to the everyday 
Linux users (well, me as a non-superuser) just for convenience sake.

Here's the line which automounts this partition in my /etc/fstab:

/dev/sdb14 /mac_hfs 		hfs	defaults	0   2


Is there something special about a mounted hfs partition that 
prevents me from changing the permissions?  How can I make this 
partition writable by everyone?

-- Bill