hi
I use cacheImage to find images that have not been cached and to cache them.
On "cache stored images", I have a lot of pages/news where I have this error
Note: the following objects have images that appear to no longer exist.

In fact, in some news/pages, I use pictures included in my theme (as download icon), or hot linked from another site (creative common icon).

Why there are warnings with this pictures, which are not in the gallery and which have not to be cached ?

Images embeded via tinyZenpage are statically embeded. From the url Zenphoto can see how their album and their image name is. If you meanwhile change teh original album name or the images names or moved them, they are not "there" anymore.

If you include images via the File manager or manually they are outside of Zenphoto's gallery and image procession and are not cached anyway.

can you have a look on this page : http://www.vincentbourganel.fr/pages/zpardoise-1.4.5 ?
there are 16 pictures in a slideshow, with cached images (and all cached images exist and refer to existing image in my gallery.
there is another image used, an icon for download my theme.
This picture is not in my gallery, but is included in my theme folder.

If I remove the download icon, there is no message.
So this is this picture which cause the note.
According to me, if Zenphoto doesn't cache external pictures (who are not located in the gallery), zenphoto should exclude those pictures from caching process and not gives a warning message.

Yes, looks like a bug that the script mistakes the static images for a managed one then. Please open a ticket.