Since when is the minecraft_server.jar downloaded from minecraft.net a 'modded version of minecraft'? This is 100% vanilla, done with no mods, default texture pack in the client, and a brand new world.
There is no way to get more vanilla than this.
Confirmed on 1.4.6 vanilla and craftbukkit. Crashes server every time.
Crash log attached.
Are you using the default texture pack? If not, try playing with that and try to replicate the issue.
Since when is the minecraft_server.jar downloaded from minecraft.net a 'modded version of minecraft'? This is 100% vanilla, done with no mods, default texture pack in the client, and a brand new world.
There is no way to get more vanilla than this.