Dan, I'm not dead sure that the filename was the real problem, although that seemed to cure it.
I copied your pic to my desktop, then right-click, 'Rename' and changed the name from 'GetAttachment.jpg' to 'DansPic.jpg', then did the usual 'Manage Attachments' stuff with the renamed pic.
I did that on a whim, in case the file download warning was triggered by the word 'attachment' in the filename.
Seemed to work, but...
Jim, (Ghost0), I like the look of that mount. I'll use one next time - no more drilling for me.
... Steve