Bukkit/CraftBukkit-Bleeding — comment on commit 8a8e4f43927c9b12c0610ff342965ce138282c4a
File: src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java line 480
By BotanEgg:

setExp(float exp)
->
setExp(exp / 100F);
??