It says "Clip Sport" on the player, and that is what I ordered. Of course when I ordered it, I expected it would at least play tracks in order, as that does seem sort of basic. I didn't know about Rockbox until I started searching for a way to fix that.
BTW, the Rockbox Utility program also autodetected the player as a Clip ZIp, and went ahead with the installation with only minor glitches. Just for curiousity's sake, what causes the player to be detected, but prevents Rockbox from actually working? Is doing a port to the Clip Sport feasible?