I find that, when creating a simple Playlist, I get slightly different results when I use Add A Folder versus just dragging and dropping a folder onto the playlist.

In the Add A Folder case the folder shows up with a folder icon (from the folder.jpg file in the folder) whereas in the drag/drop case the folder shows up with no icon - it's just a small generic icon of a folder.

So, are these two operations supposed to be the same? Is the "no folder icon" result just a bug?
If the two operations are truly different, what are the differences?

--Larry