will not delete the photo from the Library.
You seem to have a Catch22 situation here.
If the photo is in Smart Album, it is not in any other album AND is in the Library.
Deleting that photo from the Smart Album does nothing because by doing so it becomes a photo that matches the criteria that you set up for the Smart Album and so it cannot be deleted!
I have been playing with this for a little while and find that I cannot delete any pictures from a Smart Album in iPhoto11, probably for the same reason.
the option I see if for you to use the smart album, copy the photo name from the info tab, to locate the pictures in the Library and delete from there.
Ok... I have all of the photos I want to keep in a set of albums, I want to delete all of the photos in iPhoto11 that are not in an album. Then, (based on a tip about how to do this in iPhoto9) I made a smart album with the perimeters that any photo not in an album already would be in this one. When I try to take these delete these photos from this album it acts as if I did not delete them at all (instead of what I guessed it would do, deleting them from the album but not Photos library). All of these attempts yielded the result of iPhoto acting as if I did nothing: pressing the delete button when they are selected, right clicking sending to trash, dragging to iphoto trash, dragging to trash app, command+delete, option+delete, control+delete (the last 3 supposedly deleting the photos from album and Photos library in iPhoto9). Any idea how to delete the photos in the album from Photos library -- or any idea at all how to delete all the photos in iphoto11 photos library that are not in any albums. - - - Many thanks!