Itunes ignoring Read & Write permissions on external drive?

Hi,
similar but different to other reported problems:
1. I got in a mess with my library and copied a load of folders from a backup into my itunes folder, which is on an external firewire drive, which was previously fine.
2. Now I can't change info in any tunes and can't import anything.
3. I have selected the drive and subfolders, changing the permissions to Read & write for me, staff, everyone. I have said 'Apply to enclosed items' each time. Whether the drive has 'Ignore ownership' ticked or not makes no difference I think.
4. Itunes still won't let me change or import.
What to do?
thanks in advance...
Ben
Message was edited by: bennnn - added note about Ignore ownership

A bit of a long shot, but I wonder if the iTunes library file might be corrupt. You might as a test try dragging the iTunes library file to the desktop and relaunching iTunes, which will get it to create a new, blank library file. Then import a CD and see if it's successful. If so, then you know that the old library file is indeed corrupt. If no improvement, just put the old library file back, replacing the newly-created one.

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RESULT -> Still this did nothing for newly created files or folders, they still had the default permissions of Read/Write for the creating User, Read for the default Group, Read for Everyone
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I could then switch over to my wife's account, open the file, edited it, and save it, but then the permissions changed to: Her Username - Read/Write, (unknown) - Read/Write, Everyone - Read Only.
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Thanks again, V.K., for your assistance and especially for the very prompt responses.
I was unaware that I could create a volume on the HD non-destructively using disk utility. This may then turn out to be the better solution after all, but I will have to free up space on this HD and try that.
Also, I was obviously unaware of the special treatment of file creation by TextEdit. I have been using this to test my various settings, and so the inheritance of ACLs has probably been working properly, I just have been testing it incorrectly. URGH!
I created a file from Word in my wife's account, and it properly inherited the permissions of the company folder: barara - Custom, steve - Custom, barara - Read/Write, admin - Read Only, Everyone - Read Only
I tried doing the chmod commands on $TMPDIR for both of us from each of our accounts, but I still have the same behavior for TextEdit files though.
I changed the group on your shared folder to admin from wheel as you instructed with chgrp. I had already changed the umask to 002, and I just changed it back to 022 because it didn't seem to help. But now I know my testing was faulty. I will leave it this way though because I don't think it will be necessary to have it set to 002.
I do apparently still have a problem though, probably as a result of all the things I have tried to get this work while I was testing incorrectly with TextEdit.
I have just discovered that the "unknown user" only appears when I create the a file from my wife's account. It happens with any file or folder I create in her account, and it exists for very old files and folders that were migrated from the old computer. i.e. new and old files and foders have permissions: barara - Read/Write, unknown user - Read Only, Everyone - Read Only
Apparently the unknown user gets the default permissions of a group, as the umask is currently set to 022 and unknown user now gets Read Only permissions on new items, but when I had umask set to 002, the unknown user got Read/Write permissions on new items.
I realize this is now taking this thread in a different direction, but perhaps you know what might be the cause of this and how to correct or at least know where to point me to get the answer.
Also, do you happen to know how to remove users from groups? I added myself and my wife to the Wheel group because that kept showing up as the default group for folders in /Users/Shared
Thanks for your help on this, I just don't know how else one can learn these little "gotchas" without assistance from people like you!
Steve

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