--- ../src-base/minecraft/net/minecraft/client/settings/GameSettings.java
+++ ../src-work/minecraft/net/minecraft/client/settings/GameSettings.java
@@ -1067,6 +1067,7 @@
 
     public void func_74303_b()
     {
+        if (net.minecraftforge.fml.client.FMLClientHandler.instance().isLoading()) return;
         try
         {
             PrintWriter printwriter = new PrintWriter(new FileWriter(this.field_74354_ai));
