All of a sudden - Read Only access via Mac

Try creating files from Mac using your NAS account (I was unsure of which user account your were referring to when you wrote "I've tested with my user account and it is also read-only".

Ah yes - should have explained that better.

When using my NAS account on the Mac (where it's normally connected as my wife), I can 'connect as' myself no problem. But still only have read-only access. This makes me think it's something specific to how the NAS is talking to the Mac as opposed to a file permission setting error.

ps I've just resent the logs as you had asked on the other thread. I'll keep this problem to this thread from now on if that's best.

Does anyone have any ideas what I can try to resolve this, please?

mac os x 10.7.2 ?
i've heard of some Apple magic around SMB/CIFS implementation and i'm still on os 10.7.1

So the exact same NAS account is being used on the Mac and the Linux PC and only one has a read-only issue. That's strange. Is this issue restricted to only one share? Can you try creating a new share as a test and seeing if it exhibits the same behavior?

Good news - it's been resolved!

The case I logged with tech support is closed now. If anyone else finds this thread in future and is wondering how we solved it, the steps are:

Configuring Advance CIFS Permissions:
1. Go to Share listings
2. Click Cifs icon of the specific share name
3. Scroll down and put a check on "Automatically set permissions on new files and folders" under Advance CIFS Permissions and click on apply.
4. Then go to Advance Options tab
5. Share folder owner: (type the share name)
6. Share folder group: (nogroup)
7. Put a check on "Set ownership and permission for existing files and folders in this share to the above settings" and click Apply.

P.S. After you put a click on the Apply button the check will disappear inside the check box, it's normal because it's an action box.

Thanks to Reinhard at Netgear for the helpful solution. I don't fully understand the security implications of the changing the Shared_Files owner in nogroup to give Group & Everyone read/write, but since the NAS is on a private network I presume it is OK. If anyone has a link to a thread that explains any risks I might be exposed to and how to mitigate them I'd be grateful.

A caveat - this solution worked for me, in my situation and was provided on the basis of my log files. It might not fix your problem ;-)