Bukkit/CraftBukkit — comment on commit ce8dd57fff414afb761b4fd2ab3ed27902ae5dd3
File:  line 0
By troed:

Any naïve call made to getOfflinePlayers() with the newest dev builds result in an exception when this method makes its final cast:

Caused by: java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lorg.bukkit.OfflinePlayer;
at org.bukkit.craftbukkit.CraftServer.getOfflinePlayers(CraftServer.java:941)