The Manual seems to imply that Playlists are stored in Non-Volatile memory on the instrument. But doesn't say so specifically:
I know there's a dump Playlists command in the Glow Balls menu, but I've never used it. My Playlists used to be retained fine; but (possibly after upgrading to 2.1?) they seemed to revert to the pre-update lists, but again, I'm not 100% sure.
So I'm thinking that the behavior regarding Playlists seems inconsistent.
I just spent the better part of today editing and collecting my favorites, and constructing Playlists on paper.
Then I entered almost 3 full Lists (close to 120 great patches!)
I then noticed that there seemed to be vibrato on all the sounds, though I wasn't connected to another Midi entity, and the mod wheel was down, and the ribbons showed no lights. So I powered down and up again, since the unit had been on all day, and

the Playlists were all gone. I had been checking all along to make sure the Programs were getting 'saved' - I'm not sure if this is necessary, because it's undocumented, but I'd hit the soft button under each Patch after I'd entered it with the first two soft knobs, just to 'anchor it in' - which seemed like it may have been necessary, on previous days.
Any one have anything to add to my efforts? What did I do wrong? Thanks!