HFS+ ipod won't mount read write

From: John Stolz (china-rider_at_wanadoo.fr)
Date: 02/25/04 

Date: Tue, 24 Feb 2004 18:33:02 -0500

My hfs+ ipod refuses to mount rw.

dmesg contains:

HFS+-fs warning: Filesystem was not cleanly unmounted, running
fsck.hfsplus is recommended. mounting read-only.

fsck_hfs runs OK with the following output:
** /dev/sdb3
** Checking HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
   Keys out of order
(4, 3)
** Rebuilding Catalog B-tree.

but the hfsplus volume on the ipod still appears to be read only.
Any ideas anyone?