For those who do not know how to access their .minecraft folders:

Can someone post instructions for XP and Mac?

(Make sure to close Minecraft before doing this.)

For Windows Vista and Windows 7

Press the Windows key on your keyboard and the R key simultaneously to pull of the Run window. Then, in the box, type %AppData% and press OK. A bunch of folders for various applications will pop up. Click the one titled .minecraft. And of course, open Bins and replace the file titled minecraft.jar with Dusty's file (above). You will need to rename Dusty's file to minecraft.jar!