gistfile1.txt

this is run first:
    public void registerAnimation(Minecraft var1)
    {
        ModLoader.addAnimation(new FXAnimatedTexture("/thaumcraft/resources/tcubeanim.png", visCubeFX, 1));
        ModLoader.addAnimation(new FXAnimatedTexture("/thaumcraft/resources/tcrucibleanim.png", visDripFX, 1));
        ModLoader.addAnimation(new FXAnimatedTexture("/thaumcraft/resources/speedupgrade.png", spdUpgrade, 1));
        ModLoader.addAnimation(new TextureVoidCompassFX(var1));
    }

not that visCubeFX, visDripFX, spdUpgrade haven't been initialized so they are 0

then load() is run which has:
        spdUpgrade = 252;
        visCubeFX = 253;
        visDripFX = 254;

when loading a world registerAnimation is being run again with the fields having values (from the load) but for whatever reason the third animation is used in all three "addAnimation" calls