ARRGH... having the same issue as a few mentioned above:
After everything was working great for the last year, I just updated to the latest version of WP 3.6.1 and the player has simply disappeared. On the Haiku forum page someone voted that it is working fine with the WP update.. not for me though.
Tried updating the Haiku player again (Version 1.1.0), but they still aren't appearing. Everything else on my site works fine and the player/MP3 coding is still intact in the admin area, the players just wont appear. So I haven't a clue what the issue is.
Each player is a preview for a product... without the players/previews (obviously) customers wont purchase anything.
I'm desperate for some help on this issue. Anyone find a fix or have any suggestions that may help resolve this?