I noticed a couple of things while I was putting together my responses to the icon meme.
The question:
The first
Tin Man icon that I made for myself had the keyword "Glitch" and looked like this:

When I was going through my icons for the meme I noticed that it had been replaced by this image:

WTF?
Moreover, I couldn't simply reupload the old icon to the keyword "Glitch" - it would tell me the icon was successfully uploaded, but the new one was still there with that keyword and the number of icons had not changed. (Normally the more recent upload would appear with the keyword and the earlier one would still be there but with "pic #xxxxxxx" instead of the keyword.) I tried changing the new one's keyword but it wouldn't change. I uploaded the old one to a new keyword and when the dust cleared, the new one was there under the new keyword! Finally I just deleted the new one - I was pleasantly surprised that it worked - and had no difficulty uploading the old one to its original keyword.
What on earth was that all about? Is this some kind of nuisance hack going around?
( and an observation )