Currently, I've been trying to download the Doku DokuCraft texture pack, which needs the HD Patcher to work properly. If you don't know what I'm talking about, they are here, and here.
Every time I patch minecraft.jar with the patcher, then run minecraft, it shows the updating minecraft progress bar for about half a second, then it goes black. This progresses for about 10-15 seconds, before going white, for an uncounted amount of time.
What should I do? I do really want to download this pack, but it seems that I am unable.
First, try redownloading both HD Patcher and the texture pack. After that, don't do anything and then run HD Patcher. Wait for it to patch, then drag DokuCraft into your texture pack folder. Then try running Minecraft.