i just download jemplode.jar a couple of minutes ago and when connecting to my player here at work (Windoze NT 4.0) it synced up and NOTHING showed up on the player.
I had renamed the previous pre-beta (2/25) I downloaded, so I replaced the jar file and everything showed up fine.
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BTW That prebeta (2/25) gets hung up at the "Waiting for player to restart screen". Then JEmplode can not see it until I power cycle the player (though ping can see it).
It doesn't hang at home (Max OS 8.6), but home/work are slightly different versions.