I tested a bit futher and it seems that the debug-mode in eclipse always and the exported .jar file sometimes completely bypassing the

public void renderItem(ItemRenderType type, ItemStack item, Object... data) 

method. And again, if someone as some ideas on whats going on with that: reply please!

Oh! My! God! I solved the problem. I don't even need to explain what I did:

 

Here a part of my old main.java:

 

@EventHandler

public void preInit(FMLPreInitializationEvent event){

allobjects();

 

allRegisters();

 

Recipes_Items.allItemRecipes();

 

Recipes_Blocks.allBlockRecipes();

}

 

@EventHandler

public void load(FMLPreInitializationEvent event){

 

}

 

@EventHandler

public void postInit(FMLPreInitializationEvent event){

proxy.registerRenders();

}

 

 

and a part of the main.java as it is now:

 

@EventHandler

public void preInit(FMLPreInitializationEvent event ){

allobjects();

 

allRegisters();

 

Recipes_Items.allItemRecipes();

 

Recipes_Blocks.allBlockRecipes();

}

 

@EventHandler

public void load(FMLInitializationEvent event){

 

}

 

@EventHandler

public void postInit(FMLPostInitializationEvent event){

proxy.registerRenders();

}

 

 

Thanks for the help...

There are no words that would describe how silly I feel at the moment... *faceplam*

Those two look identical.  What did you find? 

Those two look identical.  What did you find?

The original code had

FMLPreInitializationEvent

as the parameter for all three methods instead of each method having the appropriate event parameter.

Ah, thanks.  I looked at that for a few minutes and my mind just wanted to read what it thought should be there and I couldn't see it.