I am hosting a server, and due to a problem with my mass-storage drive (cable of the drive got disconnected, windows and the minecraft server where on my primary drive which was just fine) which caused windows to crash, so I had to press my power button.

The player data of the players which were playing on my server during the crash was completely removed (player.dat files of those players where missing in the map-data), playerdata of the other players was fine and map was slightly rolled back (becouse mapdata wasn't saved before te server shut down)

Rolled 1 hour back, and after a litttle wile I got the same problem. And lost the playerdata of the active players again.

Player data of the non-active players was both times just fine.

What I expected to happen was...:
Mapdata/playerdata should be slightly rolebacked, becouse it wasn't saved properly.

What actually happened was...:
Mapdata was fine, but the playerdata of the player which was playing on the server, during the crash got removed. The playerdata of the other players was fine.

Steps to Reproduce:
1. Run a Minecraft server on 1.6.4
2. Log in on the server with at least 1 player
3. Make sure that the playerdata gets saved on your drive before going to step 4
4. Turn of your computer withoud giving the server a change to autosave
5. Now, the playerdata of the players playing on the server during the crash is lost, other playerdata is fine