Well, i am getting this error when installing Forge for the 1.3.2 version of Minecraft =/
I tried to install it using Winrar and removing the META-INF folder, no success...
Tried to install using MCPatcher, it runs correctly when testing in the MCPatcher, but when i close the MCPatcher an run Minecraft normally, it stays in the black screen forever =/
I don't know if this can help, but i got the content from ForgeModLoader-client-0.txt