Minecraft – In the Minecraft 1.7 update, you can turn off ambience and environment, but what noise is environment

To turn off the speed keys set move.speed.user to false in your configuration:

move.speed.user:false

Solved! I was missing a single parameter in my command-line:

--assetIndex 1.7.4

The launcher does show you most of the command-line it uses to start Minecraft but not all. To see the complete parameter list, you can create a simple batch file as follows:

@echo off
echo %*

Save this as, for example, testlaunch.bat.

Then, in the Minecraft launcher, Edit Profile and set the Java Settings > Executable to this testlaunch.bat file (wherever you put it). Hit the Play button and now the Development Console will show the full command-line, including all the authentication info.

Don't forget to set the launcher back to its original java executable when you're done.