Sometimes I use slideshows to export jpgs with border, or with filename overlay, via option/alt-clicking on "export pdf" button so it becomes "export jpg." This works fine when I have two or more images selected, but when I have one photo selected and I export jpgs from slideshow, my entire filmstrip gets exported (even though "use: selected photos" is visible, and it says below that, "1 selected."
If I create a new collection with only one image, then I can export just the one, but it was suggested on the LR forum that this might be a bug. It would be helpful for me to have the ability to create single image slideshows without having to create a new collection.