I noticed that with iTunes 10.4 (80) I can no longer drag songs from one playlist to another. It doesn’t matter whether the source is a smart playlist or a regular dumb one, or even the main music library.
As a workaround, I can copy (cmd-c) and paste (cmd-v), but this is … umm … sub-optimal, because you have to change playlists to do it. Then when you go back to the first folder, any search you might have used before is now gone.
My first thought was that it was a feature that Apple just dropped because that’s how they are, so I posted it to the discussion list on Apple’s site.
But when I made a more serious effort to find the solution, I found it. I found it a lot, in fact, which shows what a lousy job I did searching for an answer the first time. I summarized what I learned there, and I’m repeating the key points below because I’ll find them quicker on my own site.
The problem appears to be using a Wacom tablet. See the discussion here and (same thread) here and here. No idea when that will be fixed. I use a 8 or 9 year old Graphire, and drivers have been a problem for most of those. Sigh.
But this experience also made me learn that you can right click to add selections to a playlist.
I even learned how that first column works, which I never knew before.