Okay, I tried it again.

This time, I edited one pixel in the last frame (there was an error there that's been bugging me all along, anyone ever notice the one-pixel error in the last frame?). After making the one-pixel edit, I selected the Upload menu item.

This time, when I uploaded it to the player, the computer did not beep, and the pause between the time I selected "upload" and the time the "upload complete" box appeared was shorter.

This time it worked.

Is this a bug in Jemplode? Is Jemplode reporting success even when the upload failed?