Sorry Sue,
Open mouth, insert foot. I use that to manually insert images instead of waiting for the image gallery to load each time. I would have bet money that it had worked in the past and carp, it doesn't now. I know, or thought I knew, that I had "viewed source" of pages in the past and saw the alt text there. Now, it's no longer there.
Again, sorry... but I do know what my foot tastes like.