For some pictures, mostly personal, I use Flickr sets, so I can group them together and send out a link to my family, so they can access the private pictures.
Normally, I’ll upload the pictures, place them in a set and then email the family with a URL to access the images.
A day or two later, the set disappears. It is gone, like it never was there.
At first, I thought it was iPhoto removing the set. But I totally disconnected iPhoto to Flickr.
Now, I have no clue what is going on.
The images don’t disappear, I don’t think. But the sets are deleted and gone.