Okies, it seems that there's a line missing (and a different line duped) in editphoto.tmpl in the 5.2 distro file...
In the default file contained in the .52 archive, the bottom chunk of code looks like this..
Code:
Content visible to verified customers only.
Immediately I noticed that this line..
Code:
Content visible to verified customers only.
was in there twice, when it needn't be.
After loading it, and editphoto.tmpl from a v5.11 archive, into BeyondCompare, I saw what I thought was wrong.
Somehow, this line (from the 5.11 template file) had been omitted from the 5.2 template file.
Code:
Content visible to verified customers only.
Now my template file appears as follows...
Code:
Content visible to verified customers only.
And editing is all working well.