I was looking at Picasa, and thinking that I did not need all the photos there, as they are all stored at the Gate.
So I deleted some of them from Picasa.
I was wrong.
They are not stored with my blog.
They are stored in Picasa, and the ones I deleted, disappeared from the Gate.
After a major temper tantrum, I have reloaded the photos into Picasa, and put them back into their respective posts.
Does this make sense to anyone?