那是跟zombe衝突了啦... 看Zombe的說明...
http://dl.dropbox.com/u/19090066/minecraft/readme.html
id.class can be excluded if you don't want "craft" mod
If you want to use TooManyItems - now is the time to install it. Note that you can not use the "craft" mod if you do - fortunately, TMI mirrors the functionality of the "craft" mod (it is used a bit differently, but in the end it does the same thing).
懂了嗎? 要用TMI, 你就不能用Zombe的craft功能,
也就是不要把 id.class 放入minecraft.jar...
同時記得在Zombe的配置文件中, 把它關掉...