Hah! Excellent bug exploit…
After being refused permission to change the name, and changing the switch, I had to refresh the browser page, and log in to the Dashboard again. The switch was set to ‘off’, but greyed out, but the user access controls were active. Repeating the process set Public access back on.
I don’t have a problem with Public access, but I’ll remember this trick for the future…
[edit]
Interestingly, I found that Twonky had gone mad last night, and was trundling through my map tile data, thus finding hundreds of thousands of ‘pictures’.
Why did it do that? Because playing with permissions to Public had made MyCloud add ‘Public: All Media Types’ to Twonky’s Sharing configuration. I wasn’t expecting that, and it was quite persistent, in that I had to edit the /etc/contentdir to remove it, and restore a backed-up twonkyserver.ini
It’s a good job I’m familiar with Twonky, but it was harder than I expected, which reminds I still don’t completely understand how MyCloud and Twonky interact…
